A comparison of the specs and capabilities between the ROG Phone II ZS660KL and Zenfone 6 ZS630KL. We analyzed these phones to see which one was the better buy

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 ROG Phone II ZS660KL has a width of 3.1 inches (77.6 mm), a length of 6.7 inches (171 mm), and a thickness of 0.4 inches (9.5 mm). Also, the Zenfone 6 ZS630KL has a width of 3.0 inches (75.4 mm), a length of 6.3 inches (159.1 mm), and a thickness of 0.4 inches (9.2 mm).

Comparing the width and thickness of the body, there isn't much difference between the ROG Phone II ZS660KL and Zenfone 6 ZS630KL 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 ROG Phone II ZS660KL and the Zenfone 6 ZS630KL. 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 ROG Phone II ZS660KL and the Zenfone 6 ZS630KL. 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.

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 ROG Phone II ZS660KL is about 240 oz (240 g), and the weight of the Zenfone 6 ZS630KL is about 190 oz (190 g). Comparing the weight of the two devices, the Zenfone 6 ZS630KL is a considerably lighter smart phone than the ROG Phone II ZS660KL, and there is a difference of about 190 oz (50 g). In terms of the burden placed upon your fingers and wrist, the Zenfone 6 ZS630KL is superior to the ROG Phone II ZS660KL. If you are going for a smart phone that won't lead to hand fatigue even after extended use, and is less likely to place a burden on your fingers, we recommend purchasing the Zenfone 6 ZS630KL over the ROG Phone II ZS660KL.

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 ROG Phone II ZS660KL has a 6.59 inch display. Also, the Zenfone 6 ZS630KL has a 6.4 inch display. Comparing the screen size, there is a negligible difference in screen size between the ROG Phone II ZS660KL and the Zenfone 6 ZS630KL. As a result, the app buttons on both are equally easy to press. We recommend comparing them based on other aspects of performance and functionality.

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 ROG Phone II ZS660KL is 1080 x 2340, and pixel density is 391 ppi. Also, the resolution on the Zenfone 6 ZS630KL is 1080 x 2340, and pixel density is 402 ppi. Comparing the pixel count, the difference in pixel density between the ROG Phone II ZS660KL and the Zenfone 6 ZS630KL 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.

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 ROG Phone II ZS660KL is 6000 mAh, and the Zenfone 6 ZS630KL is 5000 mAh. Regarding battery capacity, there is a negligible difference in battery capacity between the ROG Phone II ZS660KL and Zenfone 6 ZS630KL. Since both have roughly equal battery life, you are better off comparing them based on other aspects of performance and functionality.

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 ROG Phone II ZS660KL's CPU is a Qualcomm SM8150 Snapdragon 855+, with performance measured at 2.96GHz+2.42GHz+1.78GHz×8(OctaCore). Also, the Zenfone 6 ZS630KL's CPU is a Qualcomm SM8150 Snapdragon 855, with performance measured at 2.84GHz+2.42GHz+1.78GHz×8(OctaCore). Comparing CPU performance, there is almost no difference in the specs of the ROG Phone II ZS660KL and the Zenfone 6 ZS630KL. 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.

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 ROG Phone II ZS660KL is 12GB and the weight of the Zenfone 6 ZS630KL is 8GB. Comparing the devices in terms of RAM, the ROG Phone II ZS660KL has more RAM than the Zenfone 6 ZS630KL, with a difference of about 4GB. For that reason the ROG Phone II ZS660KL allows for smoother multitasking than the Zenfone 6 ZS630KL, and apps are less likely to crash. In addition the ROG Phone II ZS660KL allows for smoother enjoyment of 3D games and VR. For this reason, we recommend the ROG Phone II ZS660KL.

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 ROG Phone II ZS660KL is 1024GB. Also the Zenfone 6 ZS630KL is 256GB. Regarding storage capacity, the ROG Phone II ZS660KL has a greater storage capacity compared to the Zenfone 6 ZS630KL, with a roughly 768GB difference. As a result, the ROG Phone II ZS660KL can take more pictures and videos, and have more applications installed, than the Zenfone 6 ZS630KL. Therefore, we recommend the ROG Phone II ZS660KL.

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.

ROG Phone II ZS660KL has a 48 MP main camera. Also, Zenfone 6 ZS630KL has a 48 MP main camera. Comparing rear camera performance, the ROG Phone II ZS660KL and Zenfone 6 ZS630KL have approximately the same pixel count. As a result, they can both take pictures and shoot videos of roughly the same quality. Therefore, we recommend comparing the two based on other aspects of performance and functionality.

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.