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Galaxy A9 (2018) 128GB vs Zenfone 4 Pro ZS551KL 128GB: Specs & Scores

Created date: 2018-11-18 10:17:42, Updated date: 2020-04-16 17:46:02

Galaxy A9 (2018) 128GBZenfone 4 Pro ZS551KL 128GB
Galaxy A9 (2018) 128GBZenfone 4 Pro ZS551KL 128GB

Are you having trouble comparing the differences in features and performance of the "Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", or unsure about their differences in ease-of-use, and wondering which to buy? We did a deep-dive comparison of the features, specs, and capabilities of these two smartphone, and provided our rating of which one was a better buy.

Galaxy A9 (2018) 128GBZenfone 4 Pro ZS551KL 128GB
Galaxy A9 (2018) 128GB

Zenfone 4 Pro ZS551KL 128GB

General rating:

72.8/100

(The 3366th of all smartphones)

73.7/100

(The 19th of all smartphones)

Holding comfort
59/100
62/100
Weight
57/100
60/100
Screen size
90/100
82/100
Display quality
82/100
85/100
Battery life
77/100
74/100
Processing power
92/100
91/100
Memory capacity
93/100
90/100
Storage capacity
90/100
90/100
Rear camera performance
87/100
68/100
Front camera performance
86/100
58/100

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", performance comparison

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB" size comparison. Which to choose?

The size of the body has a big influence on the ease of carrying and one-handed operation. The narrower the width, the easier it is to firmly grasp and hold, but you also have to take into account the device's thickness. Also, if the width and height are smaller, its easier to operate one-handed since its easier to extend your fingers. On the contrary, if the width and height are large, it's difficult to fit in your pocket and is bulky even when put in a bag, and portability is impaired.

The "Galaxy A9 (2018) 128GB" has a width of 77.0mm, a length of 162.5mm, and a thickness of 7.8mm. Also, the "Zenfone 4 Pro ZS551KL 128GB" has a width of 75.6mm, a length of 156.9mm, and a thickness of 7.6mm.

Comparing the width and thickness of the body, there isn't much difference between the "Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB" in terms of size. For that reason, the ease of gripping and carrying the devices in one hand is about the same for both. Therefore it's better to compare them in terms of performance and functionality.

Comparing the width and thickness of the body, there isn't a large difference in size between the "Galaxy A9 (2018) 128GB" and the "Zenfone 4 Pro ZS551KL 128GB". For that reason their one-handed operability, portability, and bulkiness when carried is about the same. That's why I think it's better to compare them in terms of other aspects of performance and functionality.

Comparing the overall size of the two devices, there isn't a big difference in size between the "Galaxy A9 (2018) 128GB" and the "Zenfone 4 Pro ZS551KL 128GB". For that reason the ease of carrying and use with one hand is about the same for both. That's why it is better to compare the two in terms of other aspects of performance and functionality.

ScoreDimensions (width x height x thickness)
Galaxy A9 (2018) 128GB59/10077.0mm x 162.5mm x 7.8mm
Zenfone 4 Pro ZS551KL 128GB62/10075.6mm x 156.9mm x 7.6mm

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", which is more comfortable to hold? Weight comparison

The weight of the device affects hand fatigue and the burden placed upon the wrist. The lighter it is, the longer you'll be able to operate the device without tiring. Also, if the burden placed on the wrist is lower, you'll be able to use the device more comfortably. However if the weight isn't right for you, it could place more of a burden on your body, causing you to feel stress.

The weight of the "Galaxy A9 (2018) 128GB" is about 183.0g, and the weight of the "Zenfone 4 Pro ZS551KL 128GB" is about 175.0g. Comparing the weight of the two devices, there isn't much difference in weight between the "Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB". That's why the likelihood of fatigue in the fingers and wrists after extended use is about the same for both. That's why it is better to compare the two in terms of other aspects of performance and functionality.

ScoreWeight
Galaxy A9 (2018) 128GB57/100183.0g
Zenfone 4 Pro ZS551KL 128GB60/100175.0g

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", whose display is easier to use?

The size of the screen affects usability and screen visibility. A larger screen means larger letters and buttons on apps, so the user is less likely to tap adjacent buttons by mistake. In addition, the user can enjoy a more intense experience when playing games and watching videos.

The "Galaxy A9 (2018) 128GB" has a 6.3inch display. Also, the "Zenfone 4 Pro ZS551KL 128GB" has a 5.5inch display. Comparing the screen size, the "Galaxy A9 (2018) 128GB" has a larger screen compared to the "Zenfone 4 Pro ZS551KL 128GB", with a roughly 0.7inch difference. As a result, the user is less likely to mistap when using apps on the "Galaxy A9 (2018) 128GB" than on the "Zenfone 4 Pro ZS551KL 128GB", and is also able to enjoy videos and games on a larger screen. Therefore, we recommend the "Galaxy A9 (2018) 128GB".

ScoreDisplay size
Galaxy A9 (2018) 128GB90/1006.3inch
Zenfone 4 Pro ZS551KL 128GB82/1005.5inch

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", which has a clearer display?

Pixel density affects picture quality, and the higher the pixel density, the better the picture quality, which means the user can gain more enjoyment from games and videos. In addition, higher picture quality decreases eyestrain, which means that the user will experience less eye fatigue after prolonged use.

The resolution on the "Galaxy A9 (2018) 128GB" is 1080 x 2220, and pixel density is 391ppi. Also, the resolution on the "Zenfone 4 Pro ZS551KL 128GB" is 1080 x 1920, and pixel density is 400ppi. Comparing the pixel count, the difference in pixel density between the "Galaxy A9 (2018) 128GB" and the "Zenfone 4 Pro ZS551KL 128GB" is negligible. As a result, they are both evenly matched in terms of picture quality and easiness on the eyes. Therefore, we recommend comparing them based on other aspects of performance and functionality.

ScorePixel density
Galaxy A9 (2018) 128GB82/100391ppi
Zenfone 4 Pro ZS551KL 128GB85/100400ppi

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", a summary of the differences in battery life

Battery performance greatly affects battery life, but greater battery capacity does not necessarily mean greater battery life, since battery efficiency should also be considered. Bigger screens and higher CPU performance will mean the batteries are depleted more quickly.

The "Galaxy A9 (2018) 128GB" is 3800.0mAh, and the "Zenfone 4 Pro ZS551KL 128GB" is 3600.0mAh. Regarding battery capacity, there is a negligible difference in battery capacity between the "Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB". Since both have roughly equal battery life, you are better off comparing them based on other aspects of performance and functionality.

ScoreBattery capacity
Galaxy A9 (2018) 128GB77/1003800.0mAh
Zenfone 4 Pro ZS551KL 128GB74/1003600.0mAh

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", which has better CPU?

CPU performance affects the ability to process programs, and the ability to process programs is determined by the product of the number of cores in the CPU and the CPU frequency. The higher this performance is, the more smoothly apps and games will run, and with low performance apps and games become heavy and stress is experienced.

The "Galaxy A9 (2018) 128GB"'s CPU is a Qualcomm SDM660 Snapdragon 660, with performance measured at 2.2GHz+1.8GHz×8(8.0-cores). Also, the "Zenfone 4 Pro ZS551KL 128GB"'s CPU is a Qualcomm MSM8998 Snapdragon 835, with performance measured at 2.45GHz+1.9GHz×8(8.0-cores). Comparing CPU performance, there is almost no difference in the specs of the "Galaxy A9 (2018) 128GB" and the "Zenfone 4 Pro ZS551KL 128GB". For that reason the level of smoothness felt when using apps and comfortable handling of games is about the same. For that reason it is better to compare them in terms of other aspects of performance and functionality.

ScoreCPU specs
Galaxy A9 (2018) 128GB92/1002.2GHz+1.8GHz×8(8.0-cores)
Zenfone 4 Pro ZS551KL 128GB91/1002.45GHz+1.9GHz×8(8.0-cores)

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", what's the difference in memory capacity?

RAM affects multitasking ability and the stability of apps. The larger the amount of RAM is, the more stability there will be even in situations where multiple apps are running simultaneously, allowing for comfortable use. In addition, animation will be more smooth, and apps will be less likely to freeze or crash. Also, without sufficient RAM, there are games you won't be able to run, so it is necessary to be careful.

The weight of the "Galaxy A9 (2018) 128GB" is 8.0GB and the weight of the "Zenfone 4 Pro ZS551KL 128GB" is 6.0GB. Comparing the devices in terms of RAM, there is almost no difference in the amount of RAM of the "Galaxy A9 (2018) 128GB" and the "Zenfone 4 Pro ZS551KL 128GB". For that reason they have about the same level of multitasking performance and 3D game and VR smoothness. That's why it is better to make a comparison in terms of other aspects of performance and functionality.

ScoreRAM size
Galaxy A9 (2018) 128GB93/1008.0GB
Zenfone 4 Pro ZS551KL 128GB90/1006.0GB

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", which has more data storage?

Storage capacity affects the amount of data that is capable of being stored. The larger the storage capacity, the more pictures you can take and the more applications you can install. In addition, if your smartphone accepts SD cards, then you can increase its storage capacity. However, there are performance related drawbacks, including a slower data transfer rate than the primary memory, and you cannot transfer all your data on the card, so be warned.

The data storage capacity of the "Galaxy A9 (2018) 128GB" is 128.0GB. Also the "Zenfone 4 Pro ZS551KL 128GB" is 128.0GB. Regarding storage capacity, there is a negligible difference in storage capacity between the "Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB". As a result, you can save roughly the same amount of pictures, and install roughly the same amount of applications, on either phone. You are better off comparing them based on other aspects of performance and functionality.

ScoreStorage size
Galaxy A9 (2018) 128GB90/100128.0GB
Zenfone 4 Pro ZS551KL 128GB90/100128.0GB

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB" rear camera performance comparison. Which has a higher resolution?

One factor that determines the performance of the exterior camera located on the back of the device (the rear/back camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

"Galaxy A9 (2018) 128GB" has a 24.0MP main camera. Also, "Zenfone 4 Pro ZS551KL 128GB" has a 16.0MP main camera. Comparing rear camera performance, the "Galaxy A9 (2018) 128GB" has a much higher pixel count compared to the "Zenfone 4 Pro ZS551KL 128GB", with a roughly 8MP difference. In terms of taking or shooting high resolution pictures or videos that will look clean when printed, the "Galaxy A9 (2018) 128GB" is superior to the "Zenfone 4 Pro ZS551KL 128GB". If you are looking for a smartphone that is suited for shooting videos and taking pictures, we recommend the "Galaxy A9 (2018) 128GB" over the "Zenfone 4 Pro ZS551KL 128GB".

ScoreRear-camera resolution
Galaxy A9 (2018) 128GB87/10024.0MP
Zenfone 4 Pro ZS551KL 128GB68/10016.0MP

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", whose front camera has a better picture quality?

One factor that determines the performance of the exterior camera located on the front of the device (the in/front camera) is the pixel count. The larger the pixel count, the higher the resolution of the pictures you can take, and the cleaner the pictures will look when printed.

"Galaxy A9 (2018) 128GB" has an 24.0MP front camera and "Zenfone 4 Pro ZS551KL 128GB" has an 8.0MP front camera. Comparing rear camera performance, the front camera of the "Galaxy A9 (2018) 128GB" has a much higher pixel count compared to the "Zenfone 4 Pro ZS551KL 128GB", with a roughly 16MP difference. As a result, the "Galaxy A9 (2018) 128GB" is more suited than the "Zenfone 4 Pro ZS551KL 128GB" for shooting videos and taking pictures. If you are looking for a smartphone that is suited for shooting high resolution selfies which will look clean when printed, we recommend the "Galaxy A9 (2018) 128GB" over the "Zenfone 4 Pro ZS551KL 128GB".

ScoreFront-camera resolution
Galaxy A9 (2018) 128GB86/10024.0MP
Zenfone 4 Pro ZS551KL 128GB58/1008.0MP

"Galaxy A9 (2018) 128GB" and "Zenfone 4 Pro ZS551KL 128GB", performance comparison by specification sheet

Galaxy A9 (2018) 128GBZenfone 4 Pro ZS551KL 128GB
ImageGalaxy A9 (2018) 128GBZenfone 4 Pro ZS551KL 128GB
MakerSamsungAsus
Release date2018-112017-10
ColorCaviar Black/Lemonade Blue/Bubblegum PinkMoonlight white/Pure Black
OSAndroidAndroid
Dimensions (width x height x thickness)77.0mm x 162.5mm x 7.8mm75.6mm x 156.9mm x 7.6mm
Weight183.0g175.0g
Display size6.3inch5.5inch
Display typeSuper AMOLEDAMOLED
Screen resolution (width x height)1080 x 22201080 x 1920
Pixel density391ppi400ppi
Battery capacity3800.0mAh3600.0mAh
ChipsetQualcomm SDM660 Snapdragon 660Qualcomm MSM8998 Snapdragon 835
CPU specs2.2GHz+1.8GHz×8(8.0-cores)2.45GHz+1.9GHz×8(8.0-cores)
RAM size8.0GB6.0GB
Storage size128.0GB128.0GB
Rear-camera resolution24.0MP16.0MP
Front-camera resolution24.0MP8.0MP

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