OnePlus 13 vs Samsung Galaxy S21 Ultra
80.5Performance37.2
76.5Display56.3
65.5Camera72
83.1Battery46.4
78.7Features78.7
17 spec wins — OnePlus 134 spec wins — Samsung Galaxy S21 Ultra
InnoReviews verdict
OnePlus 13 wins this phone face-off, 77 to 53.9, pulling ahead mainly in performance (+43) and battery (+37). Samsung Galaxy S21 Ultra still makes sense if its price or standout specs fit your needs better.
Which would you pick?
Key differences
Reasons to pick the OnePlus 13
- Stronger performance score: 81 vs 37
- Stronger display score: 77 vs 56
- Stronger battery score: 83 vs 46
- 744% higher AnTuTu 10 (GPU): 1,072,373 vs 126,989
- 400% higher telephoto: 50 MP vs 10 MP
- Lower launch price: $900 vs $1,199
Reasons to pick the Samsung Galaxy S21 Ultra
- Stronger camera score: 72 vs 66
- 233% higher Optical zoom: 10 x vs 3 x
- 116% higher Main camera: 108 MP vs 50 MP
- 25% higher Front camera: 40 MP vs 32 MP
Display
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Screen size | 6.82 ″ | 6.8 ″ |
| Panel type | LTPO AMOLED | LTPO AMOLED |
| Resolution | 1440x3168 | 3200x1440 |
| Pixel density | 510 ppi | 515 ppi+1% |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 4,500 nits+200% | 1,500 nits |
| Screen-to-body | 90.7 % | — |
| AnTuTu 10 (CPU) | 796,858+203%Top 13% | 263,424Top 88% |
| AnTuTu 10 (GPU) | 1,072,373+744%Top 10% | 126,989Top 82% |
| AnTuTu 10 (Memory) | 367,884+122%Top 10% | 165,563Top 72% |
| AnTuTu 10 (UX) | 612,068+169%Top 10% | 227,841Top 82% |
Performance
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Chipset | Snapdragon 8 Elite | Samsung Exynos 2100 |
| AnTuTu 10 | 2,849,183+264%Top 3% | 783,817Top 65% |
| Geekbench 6 (single) | 3,100+117%Top 7% | 1,430Top 52% |
| Geekbench 6 (multi) | 9,700+173%Top 4% | 3,550Top 56% |
| RAM (max) | 16 GB+33% | 12 GB |
| Storage options | 256/512GB | 128GB / 256GB / 512GB |
| Storage type | UFS 4.0 | UFS 3.1 |
Camera
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Main camera | 50 MP | 108 MP+116% |
| Main aperture | f/1.6 | f/1.8 |
| Ultra-wide | 50 MP+317% | 12 MP |
| Telephoto | 50 MP+400% | 10 MP |
| Optical zoom | 3 x | 10 x+233% |
| Max video | 8K@30fps | 8K@24fps |
| Front camera | 32 MP | 40 MP+25% |
| OIS | Yes | Yes |
Battery
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Capacity | 6,000 mAh+20% | 5,000 mAh |
| Wired charging | 100 W+300% | 25 W |
| Wireless charging | 50 W+233% | 15 W |
| Active use endurance | 13 h | — |
Design
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Weight | 210 g+8% | 228 g |
| Thickness | 8.5 mm+4% | 8.9 mm |
| IP rating | IP68/IP69 | IP68 |
| Frame material | Aluminum | Aluminum |
Connectivity
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 7 | Wi-Fi 6E |
| Bluetooth | 5.4 | 5.2 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C 3.2 |
| eSIM | Yes | Yes |
Software
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| OS at launch | Android 15 (OxygenOS 15) | Android 11 (One UI 3.1) |
| OS update pledge | 4 years | 4 years |
Audio
| Spec | OnePlus 13 | Samsung Galaxy S21 Ultra |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
Related comparisons
OnePlus 13vs Honor Magic7 ProVSOnePlus 13vs Samsung Galaxy S26 UltraVSOnePlus 13vs Xiaomi 15 UltraVSOnePlus 13vs Vivo X200 ProVSSamsung Galaxy S21 Ultravs iPhone 16eVSSamsung Galaxy S21 Ultravs Google Pixel 9aVSSamsung Galaxy S21 Ultravs Honor 400VSSamsung Galaxy S21 Ultravs Nothing Phone (3a) ProVS