Here’s a detailed comparison of the Samsung Galaxy S21 vs. Samsung Galaxy A55 5G.
📑 Table of Contents
- 📏 Size Comparison
- 🖥️ Display Comparison
- 🔋 Battery Life
- ⚡ Charging Speed
- 🔊 Speaker Test
- 🚀 Performance
- 📊 Benchmark Performance
- 📸 Camera Comparison
- 🎥 Video Quality
- 🏆 Overall Verdict
📏 Size Comparison
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Dimensions | 151.7 x 71.2 x 7.9 mm | 161.1 x 77.4 x 8.2 mm |
| Weight | 171 g | 213 g |
| Display Size | 6.2 inches | 6.6 inches |
| Display Type | Dynamic AMOLED 2X | Super AMOLED |
| Screen-to-Body Ratio | ~87.2% | ~85.3% |
| Build Material | Plastic back, aluminum frame | Glass back (Gorilla Glass), aluminum frame |
| Form Factor | Compact, lightweight | Larger, heavier |
| Ergonomics | Easier to handle with one hand | Slightly bulkier, better for media consumption |
🖥️ Display Comparison
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Display Size | 6.2 inches | 6.6 inches |
| Display Type | Dynamic AMOLED 2X | Super AMOLED |
| Resolution | 2400 x 1080 pixels (FHD+) | 2400 x 1080 pixels (FHD+) |
| Refresh Rate | 120Hz (adaptive) | 120Hz (adaptive) |
| Pixel Density | ~421 PPI | ~393 PPI |
| Brightness | Up to 1300 nits (peak) | Up to 1000 nits (peak) |
| HDR Support | Yes (HDR10+) | Yes (HDR10+) |
| Protection | Gorilla Glass Victus | Gorilla Glass Victus+ |
| Bezel Size | Slim bezels with a centered punch-hole | Slim bezels with a centered punch-hole |
| Always-On Display | Yes | Yes |
| Color Accuracy | Excellent (Wide Color Gamut) | Very Good (Wide Color Gamut) |
| Outdoor Visibility | Excellent (high brightness) | Very Good (slightly lower peak brightness) |
🔋 Battery Life
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Battery Capacity | 4000 mAh | 5000 mAh |
| Charging Speed | 25W wired fast charging | 25W wired fast charging |
| Wireless Charging | Yes (15W) | No |
| Reverse Wireless Charging | Yes (4.5W) | No |
| Battery Optimization | Adaptive Battery, Power Saving Modes | Adaptive Battery, Power Saving Modes |
| Screen-on Time (SOT) | ~5-6 hours (varies by usage) | ~6-7 hours (varies by usage) |
| Standby Time | Up to 1 day+ | Up to 1.5 days+ |
| Usage Scenarios | Moderate to heavy usage | Moderate to heavy usage |
| Battery Life Verdict | Good for a compact flagship, but smaller battery | Better due to larger battery capacity |
⚡ Charging Speed
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Battery Capacity | 4000 mAh | 5000 mAh |
| Wired Charging Speed | 25W | 25W |
| Wireless Charging Speed | 15W (Qi wireless charging supported) | No wireless charging |
| Reverse Wireless Charging | Yes (4.5W) | No reverse wireless charging |
| Charging Time (0-100%) | ~1 hour 10 minutes (with 25W charger) | ~1 hour 20 minutes (with 25W charger) |
| Included Charger | No charger in the box (in most regions) | No charger in the box (in most regions) |
| Fast Charging Support | Yes | Yes |
| USB Type | USB Type-C | USB Type-C |
| Charging Efficiency | Efficient for a 4000 mAh battery | Efficient for a 5000 mAh battery |
🔊 Speaker Test
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Speaker Configuration | Stereo speakers (earpiece + bottom-firing) | Stereo speakers (earpiece + bottom-firing) |
| Audio Output Quality | Clear and balanced sound with good depth | Clear sound, slightly less bass compared to S21 |
| Loudness | Very loud, suitable for media consumption | Loud, but slightly quieter than S21 |
| Bass Performance | Decent bass for a smartphone | Moderate bass, less pronounced than S21 |
| Clarity | Excellent clarity, even at high volumes | Good clarity, but slightly muffled at max volume |
| Dolby Atmos Support | Yes (enhances spatial audio experience) | Yes (enhances spatial audio experience) |
| 3.5mm Headphone Jack | No | No |
| Bluetooth Audio | Supports high-quality codecs (aptX, AAC, LDAC) | Supports high-quality codecs (aptX, AAC, LDAC) |
| Overall Audio Experience | Premium audio quality, great for media and gaming | Good audio quality, suitable for casual use |
🚀 Performance
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Processor | Exynos 2100 (5nm) / Snapdragon 888 (5nm) | Exynos 1480 (5nm) |
| CPU | Octa-core (1x Cortex-X1, 3x Cortex-A78, 4x Cortex-A55) | Octa-core (4x Cortex-A78, 4x Cortex-A55) |
| GPU | Mali-G78 MP14 / Adreno 660 | Xclipse 530 (based on AMD RDNA 2 architecture) |
| RAM | 8GB | 8GB |
| Storage | 128GB / 256GB (UFS 3.1) | 128GB / 256GB (UFS 3.1) |
| Operating System | Android 11 (upgradable to Android 14) | Android 14 (One UI 6.1) |
| Benchmark Scores | Geekbench 5: ~1100 (Single-core), ~3500 (Multi-core) | Geekbench 5: ~900 (Single-core), ~3000 (Multi-core) |
| AI Engine | Yes (NPU integrated) | Yes (NPU integrated) |
| Gaming Performance | Excellent (handles high-end games smoothly) | Good (handles most games well, but not as powerful as S21) |
| Thermal Management | Vapor chamber cooling | Standard cooling system |
| 5G Support | Yes | Yes |
| Overall Performance | Flagship-level performance, faster and more efficient | Mid-range performance, capable but not as powerful as S21 |
📊 Benchmark Performance
🔹 GeekBench 6
| Model | Single-Core | Multi-Core |
|---|---|---|
| Samsung Galaxy S21 | ~1100 | ~3200 |
| Samsung Galaxy A55 5G | ~900 | ~2700 |
🔹 AnTuTu 10
| Model | AnTuTu Score |
|---|---|
| Samsung Galaxy S21 | ~800,000 |
| Samsung Galaxy A55 5G | ~700,000 |
🔹 3DMark
| Model | 3DMark Wild Life Score |
|---|---|
| Samsung Galaxy S21 | ~5600 |
| Samsung Galaxy A55 5G | ~4500 |
📸 Camera Comparison
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Rear Camera Setup | 12 MP (wide, f/1.8, OIS) + 64 MP (telephoto, 3x hybrid zoom) + 12 MP (ultrawide, f/2.2) | 50 MP (wide, f/1.8, OIS) + 12 MP (ultrawide, f/2.2) + 5 MP (macro) |
| Front Camera | 10 MP (f/2.2) | 32 MP (f/2.2) |
| Video Recording (Rear) | Up to 8K @ 24fps, 4K @ 30/60fps, 1080p @ 30/60/240fps | Up to 4K @ 30fps, 1080p @ 30/60fps |
| Video Recording (Front) | Up to 4K @ 30/60fps | Up to 4K @ 30fps |
| Stabilization | OIS (Optical Image Stabilization) + EIS (Electronic Image Stabilization) | OIS (main camera only) + EIS |
| Zoom Capabilities | 3x hybrid zoom, 30x Space Zoom (digital) | 2x optical zoom, 10x digital zoom |
| Low-Light Performance | Excellent (dedicated night mode, larger sensor) | Good (night mode, but smaller sensor) |
| Dynamic Range | Advanced HDR10+ support | HDR support |
| Camera Features | Single Take, Super Steady Mode, Director’s View | Single Take, Super Steady Mode, Fun Mode |
| Overall Camera Quality | Flagship-level performance, excellent detail and color accuracy | Mid-range performance, good for everyday use |
🎥 Video Quality
| Feature | Samsung Galaxy S21 | Samsung Galaxy A55 5G |
|---|---|---|
| Rear Camera Resolution | 12 MP (wide) + 64 MP (telephoto) + 12 MP (ultrawide) | 50 MP (main) + 12 MP (ultrawide) + 5 MP (macro) |
| Front Camera Resolution | 10 MP | 32 MP |
| Video Recording (Rear) | Up to 8K @ 24fps, 4K @ 30/60fps, 1080p @ 30/60/240fps | Up to 4K @ 30fps, 1080p @ 30/60fps |
| Video Recording (Front) | Up to 4K @ 30/60fps, 1080p @ 30/60fps | Up to 4K @ 30fps, 1080p @ 30fps |
| Stabilization | OIS (Optical Image Stabilization) + EIS (Electronic Image Stabilization) | OIS + EIS (limited to main camera) |
| Video Features | Super Steady Mode, HDR10+, Pro Video Mode | Super Steady Mode, HDR10+ |
| Low-Light Performance | Excellent (dedicated night mode for video) | Good (night mode available but less advanced) |
| Dynamic Range | Advanced HDR10+ support | HDR10+ support |
| Audio in Video | Stereo audio recording | Stereo audio recording |
| Overall Video Quality | Excellent for both casual and professional use | Good for casual use, decent for advanced users |
🏆 Overall Verdict
Pros:
✅ Samsung Galaxy S21
✔️ Faster performance
✔️ Better display & speakers
✔️ 8K video recording
✔️ Premium build
Cons:
❌ Samsung Galaxy S21
⛔ Smaller battery
Pros:
✅ Samsung Galaxy A55 5G
✔️ Bigger battery
✔️ Better selfie camera
✔️ More affordable
Cons:
❌ Samsung Galaxy A55 5G
⛔ No telephoto lens
⛔ Weaker performance
