ASUS Zenfone 4 Pro ZS551KL vs Vivo X Fold6
The ASUS Zenfone 4 Pro ZS551KL (2017) runs on the Qualcomm Snapdragon 835, while the Vivo X Fold6 (2026) runs on the MediaTek Dimensity 9500; launch prices were $599 and $1900. By overall MobileRank rating, the Vivo X Fold6 leads — 88/100 vs 31/100 (a 57-point difference). Key differences: the Vivo X Fold6 has the bigger battery (6900 mAh vs 3600); the main camera is 12 MP vs 200 MP; the Vivo X Fold6 is faster in AnTuTu (3,455,738 vs 438,016); the Vivo X Fold6 is thinner (4.3mm vs 7.6mm).
Profile comparison
Category scores
ASUS Zenfone 4 Pro ZS551KL
Vivo X Fold6
What makes ASUS Zenfone 4 Pro ZS551KL better?
- Cheaper at launch: $599 vs $1900
- Overall rating 31/100
What makes Vivo X Fold6 better?
- Higher AnTuTu: 3455738 vs 438016
- Better Geekbench Single: 3293 vs 427
- Better Geekbench Multi: 10243 vs 1500
- Bigger battery: 6900 vs 3600 mAh
- Faster charging: 80W vs 18W
- Better main camera: 200MP vs 12MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (95/100 vs 33/100)
- Better camera (87/100 vs 17/100)
- Longer battery life (82/100 vs 13/100)
- Better display (81/100 vs 56/100)
- Better portability (100/100 vs 78/100)
Comparison verdict
Comparing the ASUS Zenfone 4 Pro ZS551KL vs the Vivo X Fold6, the Vivo X Fold6 scores 57 points higher (88/100 vs 31/100). In the "performance" category, the Vivo X Fold6 leads (95/100 vs 33/100). In the "camera" category, the Vivo X Fold6 leads (87/100 vs 17/100). In the "battery" category, the Vivo X Fold6 leads (82/100 vs 13/100). Value score: ASUS Zenfone 4 Pro ZS551KL — 0/100, Vivo X Fold6 — 84/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (95/100 vs 33/100). In the "display" category, the Vivo X Fold6 notably outperforms the ASUS Zenfone 4 Pro ZS551KL (81/100 vs 56/100). In the "camera" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (87/100 vs 17/100). In the "battery" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (82/100 vs 13/100). In the "portability" category, the Vivo X Fold6 notably outperforms the ASUS Zenfone 4 Pro ZS551KL (100/100 vs 78/100).
Specs comparison
| Specification | ASUS Zenfone 4 Pro ZS551KL | Vivo X Fold6 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 835 | MediaTek Dimensity 9500 | |
| AnTuTu | 438016 | 3455738 | |
| Geekbench Single | 427 | 3293 | |
| Geekbench Multi | 1500 | 10243 | |
| Display | 5.5" AMOLED | 8.0" LTPO AMOLED | |
| Resolution | 1080x1920 | 2480x2200 | |
| Refresh rate | 60 Hz | 120 Hz | |
| Battery | 3600 mAh | 6900 mAh | |
| Charging | 18W | 80W | |
| Wireless charging | 0W | 50W | |
| Main camera | 12 MP | 200 MP | |
| Ultrawide | 0 MP | 50 MP | |
| Telephoto | 16 MP | 50 MP | |
| Front camera | 8 MP | 20 MP | |
| RAM | 6GB | 16GB | |
| Storage | 64GB / 128GB | 512GB | |
| OS | Android 7.1.1 Nougat | Android 15 | |
| Brightness (peak) | — | 5500 nits | |
| NFC | yes | yes | |
| Protection | — | IP68 | |
| Dimensions | 156.9×75.6×7.6 mm | 159.7×142.3×4.3 mm | |
| Weight | 175 g | — | |
| Launch price | $599 | $1900 |
Camera comparison
ASUS Zenfone 4 Pro ZS551KL
- Main: 12MP f/1.7
- Telephoto: 16MP
- Front: 8MP
Vivo X Fold6
- Main: 200MP f/1.75
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
ASUS Zenfone 4 Pro ZS551KL
- 5.5" AMOLED
- Resolution: 1080x1920
- Refresh rate: 60 Hz
Vivo X Fold6
- 8.0" LTPO AMOLED
- Resolution: 2480x2200
- Refresh rate: 120 Hz
Battery and charging
ASUS Zenfone 4 Pro ZS551KL
- 3600 mAh
- Wired: 18W
- No wireless charging
Vivo X Fold6
- 6900 mAh
- Wired: 80W
- Wireless: 50W
Overall performance score
We compared ASUS Zenfone 4 Pro ZS551KL and Vivo X Fold6, covering their specs and all relevant benchmarks.
Vivo X Fold6 leads ASUS Zenfone 4 Pro ZS551KL by 87.3% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $1301. ASUS Zenfone 4 Pro ZS551KL was $1301 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (95/100 vs 33/100).
display
In the "display" category, the Vivo X Fold6 notably outperforms the ASUS Zenfone 4 Pro ZS551KL (81/100 vs 56/100).
camera
In the "camera" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (87/100 vs 17/100).
battery
In the "battery" category, the Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL (82/100 vs 13/100).
portability
In the "portability" category, the Vivo X Fold6 notably outperforms the ASUS Zenfone 4 Pro ZS551KL (100/100 vs 78/100).
Frequently asked questions
Which is better: the ASUS Zenfone 4 Pro ZS551KL or the Vivo X Fold6?
The Vivo X Fold6 significantly outperforms the ASUS Zenfone 4 Pro ZS551KL by 57 points (88/100 vs 31/100).
What is the rating of the ASUS Zenfone 4 Pro ZS551KL and the Vivo X Fold6?
The ASUS Zenfone 4 Pro ZS551KL has a MobileRank rating of 31/100, the Vivo X Fold6 — 88/100.
Which has the better camera: the ASUS Zenfone 4 Pro ZS551KL or the Vivo X Fold6?
The Vivo X Fold6 leads on camera score (87/100 vs 17/100).
Which is more powerful: the ASUS Zenfone 4 Pro ZS551KL or the Vivo X Fold6?
The Vivo X Fold6 leads on performance (95/100 vs 33/100).
Should you choose the ASUS Zenfone 4 Pro ZS551KL over the Vivo X Fold6?
The Vivo X Fold6 is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.