Compare vivo U3 with 4363 devices. You can see which you should buy through this compiled table

Color:Mineral Gray/Aqua Blue/Satin Coral, Dimensions (width x height x thickness):3.0 inches (75.7 mm) x 6.5 inches (164.9 mm) x 0.4 inches (8.9 mm), Weight:180 oz (180 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1600, Pixel density:269 ppi, Display size:6.5 inch, OS:Android, Chipset:MediaTek Helio G25, CPU specs:2.0GHz+1.5GHz×8(OctaCore), RAM size:2GB, Storage size:32GB, Rear-camera resolution:48 MP, Front-camera resolution:5 MP

Color:Navy Black/Neon, Dimensions (width x height x thickness):3.0 inches (75 mm) x 6.4 inches (162.2 mm) x 0.3 inches (7.9 mm), Weight:177 oz (177 g), Display type:LTPS IPS LCD, Screen resolution (width x height):1080 x 2400, Pixel density:404 ppi, Display size:6.5 inch, OS:Android, Chipset:MediaTek MT6853V Dimensity 720 5G, CPU specs:2.0GHz+2.0GHz×8(OctaCore), RAM size:8GB, Storage size:128GB, Rear-camera resolution:16 MP, Front-camera resolution:8 MP

Color:Black/White/Blue/Red, Dimensions (width x height x thickness):3.0 inches (75.8 mm) x 6.5 inches (164 mm) x 0.4 inches (8.9 mm), Weight:205 oz (205 g), Display type:TFT, Screen resolution (width x height):720 x 1560, Pixel density:264 ppi, Display size:6.5 inch, OS:Android, CPU specs:2.3GHz+1.8GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Rear-camera resolution:48 MP, Front-camera resolution:8 MP

Color:Black/White, Display type:TFT, Screen resolution (width x height):720 x 1520, Pixel density:258 ppi, Display size:6.5 inch, OS:Android, Chipset:Qualcomm SM4250 Snapdragon 450, CPU specs:1.8GHz×8(OctaCore), RAM size:3GB, Storage size:32GB, Rear-camera resolution:13 MP, Front-camera resolution:5 MP

Color:Gray/Blue/Red+Mint, Dimensions (width x height x thickness):3.0 inches (76.8 mm) x 6.5 inches (165.4 mm) x 0.4 inches (9 mm), Weight:215 oz (215 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2400, Pixel density:394 ppi, Display size:6.67 inch, OS:Android, Chipset:Qualcomm SM7225 Snapdragon 750G 5G, CPU specs:2.2GHz+1.8GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Rear-camera resolution:108 MP, Front-camera resolution:16 MP

Color:Gray/Green/Violet, Dimensions (width x height x thickness):3.0 inches (77.3 mm) x 6.4 inches (162 mm) x 0.4 inches (9.2 mm), Weight:199 oz (199 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:394 ppi, Display size:6.53 inch, OS:Android, Chipset:MediaTek Dimensity 800U 5G, CPU specs:2.4GHz+2.0GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Rear-camera resolution:48 MP, Front-camera resolution:13 MP

Color:Gray/Green/Blue/Orange, Dimensions (width x height x thickness):3.0 inches (77.3 mm) x 6.4 inches (162.3 mm) x 0.4 inches (9.6 mm), Weight:198 oz (198 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:394 ppi, Display size:6.53 inch, OS:Android, Chipset:Qualcomm SM6115 Snapdragon 662, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:8GB, Storage size:256GB, Rear-camera resolution:48 MP, Front-camera resolution:8 MP

Color:Cool Blue/Poco Yellow/Power Black, Dimensions (width x height x thickness):3.0 inches (77.3 mm) x 6.4 inches (162.3 mm) x 0.4 inches (9.6 mm), Weight:198 oz (198 g), Display type:IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:394 ppi, Display size:6.53 inch, OS:Android, Chipset:Qualcomm SM6115 Snapdragon 662, CPU specs:2.0GHz+1.8GHz×8(OctaCore), RAM size:4GB, Storage size:128GB, Rear-camera resolution:48 MP, Front-camera resolution:8 MP

Color:Sunset Melody/Midnight Jazz/Moonlight Sonata, Dimensions (width x height x thickness):2.9 inches (74.2 mm) x 6.3 inches (158.8 mm) x 0.3 inches (7.4 mm), Weight:170 oz (170 g), Display type:AMOLED, Screen resolution (width x height):1080 x 2400, Pixel density:408 ppi, Display size:6.44 inch, OS:Android, Chipset:Qualcomm SDM765 Snapdragon 765G, CPU specs:2.4GHz+2.2GHz+1.8GHz×8(OctaCore), RAM size:8GB, Storage size:128GB, Rear-camera resolution:64 MP, Front-camera resolution:44 MP

Color:Blue, Dimensions (width x height x thickness):2.9 inches (73.4 mm) x 6.3 inches (159.2 mm) x 0.3 inches (7.9 mm), Weight:168 oz (168 g), Display type:AMOLED, Screen resolution (width x height):1080 x 2340, Pixel density:398 ppi, Display size:6.47 inch, OS:Android, Chipset:Qualcomm SDM765 Snapdragon 765G, CPU specs:2.4GHz+2.2GHz+1.8GHz×8(OctaCore), RAM size:8GB, Storage size:128GB, Rear-camera resolution:64 MP, Front-camera resolution:20 MP

Color:Aurora Glamour, Dimensions (width x height x thickness):3.0 inches (76.3 mm) x 6.4 inches (162.7 mm) x 0.3 inches (8.8 mm), Weight:184 oz (184 g), Display type:LTPS IPS LCD, Screen resolution (width x height):1080 x 2340, Pixel density:394 ppi, Display size:6.53 inch, OS:Android, Chipset:MediaTek MT6873 Dimensity 800 5G, CPU specs:2.0GHz+2.0GHz×8(OctaCore), RAM size:6GB, Storage size:128GB, Rear-camera resolution:48 MP, Front-camera resolution:16 MP

Color:Agate Greeen/Power Gray, Dimensions (width x height x thickness):3.0 inches (75.2 mm) x 6.3 inches (159.2 mm) x 0.3 inches (8.7 mm), Weight:175 oz (175 g), Display type:IPS LCD, Screen resolution (width x height):720 x 1520, Pixel density:270 ppi, Display size:6.22 inch, OS:Android, Chipset:Unisoc SC9863A, CPU specs:1.6GHz+1.2GHz×8(OctaCore), RAM size:4GB, Storage size:128GB, Rear-camera resolution:13 MP, Front-camera resolution:5 MP