Let's compare each phone and tablet in the specs table.
| ROG Phone 5 | ROG Phone 5 Ultimate | Zenfone 8 | Galaxy S21 5G | Zenfone 8 Flip | Xperia 1 III | |
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| Manufacturer | ASUS | ASUS | ASUS | SAMSUNG | ASUS | Sony Mobile Communications |
| Release Date | ||||||
| Screen Size | 6.78 inch | 6.78 inch | 5.9 inch | 6.2 inch | 6.67 inch | 6.5 inch |
| Resolution | 1,080 x 2,448 | 1,080 x 2,448 | 1,080 x 2,400 | 1,080 x 2,400 | 1,080 x 2,400 | 1,644 x 3,840 |
| Display Details | AMOLED | AMOLED | AMOLED | AMOLED | OLED | |
| Max Refresh Rate | 144 Hz | 144 Hz | 120 Hz | 90 Hz | 120 Hz | |
| Max Brightness | 1100 nits | 1000 nits | ||||
| Body Size | 77mm x 173mm x 9.9mm | 77mm x 173mm x 9.9mm | 68.5mm x 148mm x 8.9mm | 71.2mm x 151.7mm x 7.9mm | 77.28mm x 165.04mm x 9.6mm | 71mm x 165mm x 8.2mm |
| Weight | 239 g | 239 g | 169 g | 171 g | 230 g | 188 g |
| Processor | Qualcomm Snapdragon 888 Octa-core CPU 2.84GHz | Qualcomm Snapdragon 888 Octa-core CPU 2.84GHz | Qualcomm Snapdragon 888 octa-core | Qualcomm Snapdragon 888 2.8GHz×1+2.4GHz×3 + 1.8GHz×4 | Qualcomm Snapdragon 888 octa-core | Qualcomm Snapdragon 888 |
| OS | Android 11 | Android 11 | Android 11 | Android 11 | Android 11 | Android 11 |
| Main camera 1 | 64-megapixel | 64-megapixel | 64-megapixel(f/1.8) | 12-megapixel(f/1.8) | 64-megapixel(f/1.8) | 12-megapixel(f/1.7) |
| Main camera 1 details | wide angle | wide angle | Sony IMX686 | 1/1.7 inch wide angle | Sony IMX686 | Standard 24mm |
| Main camera 2 | 13-megapixel | 13-megapixel | 12-megapixel(f/2.2) | 12-megapixel(f/2.2) | 12-megapixel(f/2.2) | 12-megapixel(f/2.3) |
| Main camera 2 details | ultra-wide angle | ultra-wide angle | Sony IMX363 (ultra wide angle + 4cm macro) | 1/2.5-inch Ultra wide angle | Sony IMX363 (ultra wide angle + 4cm macro) | Telephoto 70mm(f/2.3),105mm(f/2.8) |
| Main camera 3 | 5-megapixel | 5-megapixel | 64-megapixel(f/2) | 8-megapixel | 12-megapixel(f/2.2) | |
| Main camera 3 details | macro | macro | 1/1.7-inch telephoto | Telephoto 3X wide angle zoom (12X digital) | Ultra wide angle 16mm | |
| Main camera 4 | ||||||
| Main camera 4 details | ||||||
| Main camera 5 | ||||||
| Main camera 5 details | ||||||
| Sub camera 1 | 24-megapixel | 24-megapixel | 10-megapixel(f/2.2) | 8-megapixel(f/2) | ||
| Sub camera 1 details | 1/3.2-inch wide angle | |||||
| Sub camera 2 | ||||||
| Sub camera 2 details | ||||||
| Battery | 6,000 mAh | 6,000 mAh | 4,000 mAh | 4,000 mAh | 5,000 mAh | 4,500 mAh |
| Video playback time | ||||||
| RAM(GB) | 12 G | 18 G | 8 G | 8 G | 8 G | 12 G |
| ROM(GB) | 256 G | 512 G | 128 G | 256 G | 128 G | 256 G |
| Antutu | 810,000 ver9(estimated) | 810,000 ver9(estimated) | 715,000 ver8(estimated) | 725,000 ver8(estimated) | 725,000 ver8(estimated) | 761,000 ver9(estimated) |
| Water resistance | - | - | IPX5/IPX8 | IPX5/IPX8 | - | IPX5/IPX8 |
| Dust resistance | - | - | IP6X | IP6X | - | IP6X |
| SIM | dualSIM(nanoSIM+nanoSIM) | dualSIM(nanoSIM+nanoSIM) | 2 nanoSIM | 2 nanoSIM | 2 nanoSIM | |
| NFC | NFC-enabled | NFC-enabled | Felica | NFC-enabled | Felica |