Oppo K12x vs Vivo iQOO 15 Ultra
The Oppo K12x (2024) runs on the Qualcomm Snapdragon 695 5G, while the Vivo iQOO 15 Ultra (2026) runs on the Qualcomm Snapdragon 8 Elite Gen 5. By overall MobileRank rating, the Vivo iQOO 15 Ultra leads — 84/100 vs 33/100 (a 51-point difference). Key differences: the Vivo iQOO 15 Ultra has the bigger battery (7400 mAh vs 5500); the Vivo iQOO 15 Ultra is faster in AnTuTu (4,602,290 vs 592,015); the Vivo iQOO 15 Ultra has NFC for contactless payments, the Oppo K12x doesn't; the Oppo K12x is noticeably lighter (191g vs 227g).
Oppo K12x
Vivo iQOO 15 Ultra
- Lighter: 191g vs 227g
- Better design/ergonomics (61/100 vs 16/100)
- Higher AnTuTu: 4602290 vs 592015
- Better Geekbench Single: 3640 vs 905
- Better Geekbench Multi: 11033 vs 2003
- Bigger battery: 7400 vs 5500 mAh
- Faster charging: 120W vs 80W
- Higher refresh rate: 144Hz vs 120Hz
- Higher performance (97/100 vs 0/100)
- Better camera (74/100 vs 27/100)
- Longer battery life (86/100 vs 58/100)
Comparing the Oppo K12x vs the Vivo iQOO 15 Ultra, the Vivo iQOO 15 Ultra scores 51 points higher (84/100 vs 33/100). In the "performance" category, the Vivo iQOO 15 Ultra leads (97/100 vs 0/100). In the "camera" category, the Vivo iQOO 15 Ultra leads (74/100 vs 27/100). In the "battery" category, the Vivo iQOO 15 Ultra leads (86/100 vs 58/100). In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Oppo K12x (97/100 vs 0/100). In the "display" category, both devices are on the same level — 100/100. In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Oppo K12x (74/100 vs 27/100). In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Oppo K12x (86/100 vs 58/100). In the "design" category, the Oppo K12x significantly outperforms the Vivo iQOO 15 Ultra (61/100 vs 16/100). In the "value for money" category, both devices are on the same level — 55/100.
| Specification | Oppo K12x | Vivo iQOO 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 695 5G | Qualcomm Snapdragon 8 Elite Gen 5 | |
| AnTuTu | 592015 | 4602290 | |
| Geekbench Single | 905 | 3640 | |
| Geekbench Multi | 2003 | 11033 | |
| Display | 6.7" OLED | 6.8" LTPO AMOLED | |
| Resolution | 1080x2400 | 1440x3168 | |
| Refresh rate | 120 Hz | 144 Hz | |
| Battery | 5500 mAh | 7400 mAh | |
| Charging | 80W | 120W | |
| Wireless charging | 0W | 50W | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 16 MP | 32 MP | |
| RAM | 8GB / 12GB | 12GB / 16GB / 24GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 14, ColorOS 14 | Android 16 | |
| Brightness (peak) | 2100 nits | 8000 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 162.9×75.6×8.1 mm | 163.7×76.8×8.7 mm | |
| Weight | 191 g | 227 g | |
| Price | — | $799 |
Oppo K12x
- Main: 50MP f/f/1.8
- Front: 16MP
Vivo iQOO 15 Ultra
- Main: 50MP f/f/1.9
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Oppo K12x
- 6.7" OLED
- Resolution: 1080x2400
- Refresh rate: 120 Hz
Vivo iQOO 15 Ultra
- 6.8" LTPO AMOLED
- Resolution: 1440x3168
- Refresh rate: 144 Hz
Oppo K12x
- 5500 mAh
- Wired: 80W
- No wireless charging
Vivo iQOO 15 Ultra
- 7400 mAh
- Wired: 120W
- Wireless: 50W
We compared Oppo K12x and Vivo iQOO 15 Ultra, covering their specs and all relevant benchmarks.
Vivo iQOO 15 Ultra leads Oppo K12x by 87.1% in our overall performance rating.
Oppo K12x
Price unknownperformance
In the "performance" category, the Vivo iQOO 15 Ultra significantly outperforms the Oppo K12x (97/100 vs 0/100).
display
In the "display" category, both devices are on the same level — 100/100.
camera
In the "camera" category, the Vivo iQOO 15 Ultra significantly outperforms the Oppo K12x (74/100 vs 27/100).
battery
In the "battery" category, the Vivo iQOO 15 Ultra notably outperforms the Oppo K12x (86/100 vs 58/100).
design
In the "design" category, the Oppo K12x significantly outperforms the Vivo iQOO 15 Ultra (61/100 vs 16/100).
value for money
In the "value for money" category, both devices are on the same level — 55/100.
Which is better: the Oppo K12x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra significantly outperforms the Oppo K12x by 51 points (84/100 vs 33/100).
What is the rating of the Oppo K12x and the Vivo iQOO 15 Ultra?
The Oppo K12x has a MobileRank rating of 33/100, the Vivo iQOO 15 Ultra — 84/100.
Which has the better camera: the Oppo K12x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on camera score (74/100 vs 27/100).
Which is more powerful: the Oppo K12x or the Vivo iQOO 15 Ultra?
The Vivo iQOO 15 Ultra leads on performance (97/100 vs 0/100).
Should you choose the Oppo K12x over the Vivo iQOO 15 Ultra?
The Oppo K12x is a better fit for everyday use. The Vivo iQOO 15 Ultra is a better fit for gamers and power users, those who care about battery life.