Samsung Galaxy S21 Ultra vs Samsung Galaxy S25
37.2Performance75.3
56.3Display61.3
72Camera47.3
46.4Battery51.4
78.7Features94.7
6 spec wins — Samsung Galaxy S21 Ultra11 spec wins — Samsung Galaxy S25
InnoReviews verdict
Samsung Galaxy S25 wins this phone face-off, 64.1 to 53.9, pulling ahead mainly in performance (+38) and features (+16). 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 Samsung Galaxy S21 Ultra
- Stronger camera score: 72 vs 47
- 233% higher Optical zoom: 10 x vs 3 x
- 233% higher Front camera: 40 MP vs 12 MP
- 116% higher Main camera: 108 MP vs 50 MP
- 25% higher capacity: 5,000 mAh vs 4,000 mAh
Reasons to pick the Samsung Galaxy S25
- Stronger performance score: 75 vs 37
- Stronger display score: 61 vs 56
- Stronger battery score: 51 vs 46
- Stronger features score: 95 vs 79
- 629% higher AnTuTu 10 (GPU): 925,248 vs 126,989
- Lower launch price: $800 vs $1,199
Display
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Screen size | 6.8 ″+10% | 6.2 ″ |
| Panel type | LTPO AMOLED | Dynamic LTPO AMOLED 2X |
| Resolution | 3200x1440 | 1080x2340 |
| Pixel density | 515 ppi+24% | 416 ppi |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1,500 nits | 2,600 nits+73% |
| Screen-to-body | — | 91.1 % |
| AnTuTu 10 (CPU) | 263,424Top 88% | 792,959+201%Top 16% |
| AnTuTu 10 (GPU) | 126,989Top 82% | 925,248+629%Top 16% |
| AnTuTu 10 (Memory) | 165,563Top 72% | 331,698+100%Top 25% |
| AnTuTu 10 (UX) | 227,841Top 82% | 528,650+132%Top 19% |
Performance
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Chipset | Samsung Exynos 2100 | Snapdragon 8 Elite for Galaxy |
| AnTuTu 10 | 783,817Top 65% | 2,578,555+229%Top 5% |
| Geekbench 6 (single) | 1,430Top 52% | 2,950+106%Top 9% |
| Geekbench 6 (multi) | 3,550Top 56% | 9,400+165%Top 5% |
| RAM (max) | 12 GB | 12 GB |
| Storage options | 128GB / 256GB / 512GB | 128/256/512GB |
| Storage type | UFS 3.1 | UFS 4.0 |
Camera
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Main camera | 108 MP+116% | 50 MP |
| Main aperture | f/1.8 | f/1.8 |
| Ultra-wide | 12 MP | 12 MP |
| Telephoto | 10 MP | 10 MP |
| Optical zoom | 10 x+233% | 3 x |
| Max video | 8K@24fps | 8K@30fps |
| Front camera | 40 MP+233% | 12 MP |
| OIS | Yes | Yes |
Battery
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Capacity | 5,000 mAh+25% | 4,000 mAh |
| Wired charging | 25 W | 25 W |
| Wireless charging | 15 W | 15 W |
| Active use endurance | — | 12 h |
Design
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Weight | 228 g | 162 g+29% |
| Thickness | 8.9 mm | 7.2 mm+19% |
| IP rating | IP68 | IP68 |
| Frame material | Aluminum | Armor Aluminum |
Connectivity
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 6E | Wi-Fi 7 |
| Bluetooth | 5.2 | 5.4 |
| NFC | Yes | Yes |
| USB | USB-C 3.2 | USB-C 3.2 |
| eSIM | Yes | Yes |
Software
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| OS at launch | Android 11 (One UI 3.1) | Android 15 (One UI 7) |
| OS update pledge | 4 years | 7 years+75% |
Audio
| Spec | Samsung Galaxy S21 Ultra | Samsung Galaxy S25 |
|---|---|---|
| Stereo speakers | Yes | Yes |
| 3.5mm jack | No | No |
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