Samsung Galaxy S21 vs. Samsung Galaxy A55 5G

Samsung Galaxy S21 vs. Samsung Galaxy A55 5G

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

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