Samsung Galaxy S21 5G vs Samsung Galaxy A51 Comparison and Differences
Smartphone 1
Samsung Galaxy S21 5G
Smartphone 2
Samsung Galaxy A51
Smartphone 3
Samsung Galaxy S21 5G or Samsung Galaxy A51 Specs Comparison
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Common specs
| Brand and model | Samsung Galaxy S21 5G | Samsung Galaxy A51 | |
| Rating | (+0) | (+0) | |
| Release date | 2021, January 14 | 2019, December | |
| Dimensions (HxWxD) | 151.7 x 71.2 x 7.9 mm | 5.97 x 5.97 x 2.8 in | 158.5 x 73.6 x 7.9 mm | 6.24 x 6.24 x 2.9 in | |
| Weight | 169 g | 5.96 oz | 172 g | 6.07 oz | |
| Body Build | Glass front (Gorilla Glass Victus), plastic back, aluminum frame | Glass front (Gorilla Glass 3), plastic back, plastic frame | |
| Case | buy from Amazon | buy from Amazon | |
| Colors | Phantom Gray, Phantom White, Phantom Violet, Phantom Pink | Prism Crush Black, White, Blue, Pink | |
| Battery | 4000 mAh, Li-Ion, non-removable | 4000 mAh, Non-removable Li-Po | |
| Battery life |
Talking time - Up to 32 h (3G) Music play - Up to 87 h |
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| Approximate price | $ 800 | $280 | |
| Check price | from Amazon | from Amazon |
Screen
| Technology | Dynamic AMOLED 2X | Super AMOLED | |
| Touchscreen | capacitive touchscreen | capacitive touchscreen | |
| Display colors | 16M | 16M | |
| Screen size | 6.2" in | 6.5" in | |
| Screen area | 94.1 cm2 | 102.0 cm2 | |
| Screen format | 20:9 (height:width) | 20:9 (height:width) | |
| Screen to body ratio | 87.2% | 87.4% | |
| Screen resolution | 1080 x 2400 px | 1080 x 2400 px | |
| Screen PPI /points per inch/ | 421 PPI | 405 PPI | |
| Screen protection | Corning Gorilla Glass Victus | Corning Gorilla Glass 3 | |
| Other specs | - Always-on display -120Hz -HDR10+ -1300 nits (peak) |
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| Screen protector | buy from Amazon | buy from Amazon |
Camera and Video
| Rear camera, main | 12 MP, Triple | 48 MP, Quad | |
| Camera specs | -12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, Dual Pixel PDAF, OIS -64 MP, f/2.0, 29mm (telephoto), 1/1.72", 0.8µm, PDAF, OIS, 1.1x optical zoom, 3x hybrid zoom -12 MP, f/2.2, 13mm, 120˚ (ultrawide), 1/2.55" 1.4µm, Super Steady video |
-48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF -12 MP, f/2.2, 12mm (ultrawide) -5 MP, f/2.4, 25mm (macro), 1/5.0", 1.12µm -5 MP, f/2.2, 1/5.0", 1.12µm, depth sensor |
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| Functions | LED flash, auto-HDR, panorama | LED flash, panorama, HDR | |
| Video | 8K@24fps, 4K@30/60fps, 1080p@30/60/240fps, 720p@960fps, HDR10+, stereo sound rec., gyro-EIS | 2160p@30fps, 1080p@30/120fps; gyro-EIS | |
| DxOMark Main Score | 116 | 87 | |
| DxOMark Photo | 123 | 90 | |
| DxOMark Video | 93 | 86 | |
| Front camera, selfie | 10 MP, Single | 32 MP, Single | |
| Specifications | 10 MP, f/2.2, 26mm (wide), 1/3.24'', 1.22µm, Dual Pixel PDAF | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm | |
| Functions | Dual video call, Auto-HDR | HDR | |
| Video | 4K@30/60fps, 1080p@30fps | 1080p@30fps | |
| DxOMark Selfie Score | 98 | ||
| DxOMark Photo | 100 | ||
| DxOMark Video | 95 |
Performance
| Operating system - OS | Android 11, One UI 3.1 | Android 10.0; One UI 2 | |
| Chipset | - Exynos 2100 (5 nm) - Qualcomm SM8350 Snapdragon 888 (5 nm) - USA/China |
- Exynos 9611 (10nm) | |
| CPU | - Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - International -Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680 - USA/China |
- Octa-core (4x2.3 GHz Cortex-A73 & 4x1.7 GHz Cortex-A53) | |
| GPU | Mali-G78 MP14 - International Adreno 660 - USA/China |
Mali-G72 MP3 | |
| External memory | No | microSD, up to 1 TB (dedicated slot) | |
| Internal memory | 128GB 8GB RAM, 256GB 8GB RAM | 64GB 4GB RAM, 128GB 4GB RAM, 128GB 6GB RAM, 128GB 8GB RAM |
Benchmark
| Antutu 10 Total | 715197 | 266589 | |
| Antutu 10 CPU | 205401 | 78142 | |
| Antutu 10 GPU | 214138 | 45333 | |
| Antutu 10 Mem | 131954 | 67437 | |
| Antutu 10 UX | 205401 | 78142 | |
| Antutu 9 Total | 755368 | ||
| Antutu 8 Total | 601547 | 138454 | |
| Antutu 7 Total | |||
| GeekBench 6 Single Core | 325 | ||
| GeekBench 6 Multi Core | 1031 | ||
| GeekBench 6 OpenCL | 761 | ||
| GeekBench 6 Vulkan | 1472 | ||
| GeekBench 5 Single Core | 945 | 264 | |
| GeekBench 5 Multi-Core | 3061 | 1276 |
Communication and Connectivity
| SIM card | Single SIM (Nano-SIM and/or eSIM)Dual SIM (Nano-SIM and/or eSIM, dual stand-by) | Single SIM (Nano-SIM)Dual SIM (Nano-SIM, dual stand-by) | |
| Network | GSM / CDMA / HSPA / EVDO / LTE / 5G | GSM / HSPA / LTE | |
| Bands | -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (Dual SIM model only) CDMA 800 / 1900 & TD-SCDMA -3G - HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 CDMA2000 1xEV-DO -4G - LTE -5G - SA/NSA/Sub6/mmWave |
-2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 (dual-SIM model only) -3G - HSDPA 850 / 900 / 1900 / 2100 HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 -4G - LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 20(800), 26(850), 28(700), 38(2600), 40(2300), 41(2500), 66(1700/2100) |
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| Speed | HSPA 42.2/5.76 Mbps, LTE-A (CA), 5G | HSPA, LTE-A | |
| GPRS | Yes | Yes | |
| Edge | Yes | Yes | |
| Wi-Fi | Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot | |
| GPS | Yes, with A-GPS, GLONASS, BDS, GALILEO | Yes, with A-GPS, GLONASS, GALILEO, BDS | |
| NFC | Yes | Yes | |
| USB | USB Type-C 3.2, USB On-The-Go | 2.0, Type-C 1.0 reversible connector, USB On-The-Go | |
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE | |
| Harmful irradiation |
SAR - 0.74 W/kg (head) 1.08 W/kg (body) SAR EU - 0.46 W/kg (head) 1.51 W/kg (body) |
SAR - 0.80 W/kg (head) 0.67 W/kg (body) SAR EU - 0.37 W/kg (head) 1.59 W/kg (body) |
Music and Audio
| Radio | FM radio (Snapdragon only) | FM radio | |
| Headphone jack | No | Yes | |
| Others | - 32-bit/384kHz audio -Tuned by AKG |
- Active noise cancellation with dedicated mic |
Other features
| Sensors | - Fingerprint (under display, ultrasonic), accelerometer, gyro, proximity, compass, barometer | - Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | |
| Other extras |
- Samsung DeX, Samsung Wireless DeX (desktop experience support) -ANT+ -Bixby natural language commands and dictation - Fast charging 25W -USB Power Delivery 3.0 -Fast Qi/PMA wireless charging 15W -Reverse wireless charging 4.5W - Samsung Pay (Visa, MasterCard certified) -IP68 dust/water resistant (up to 1.5m for 30 mins) |
- ANT+ - Fast battery charging 15W |
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| Versions |
- Versions: SM-G991B, SM-G991B/DS (International); SM-G991U (USA); SM-G991U1 (USA unlocked); SM-G991W (Canada); SM-G991N (Korea); SM-G9910 (China) |
- Versions: SM-A515F/DSN (Global); SM-A515F/DS (LATAM); SM-A515F/DST (Brazil); SM-A515F/DSM (Russia); SM-A515F/N (Australia) |
Reviews and Opinions on Samsung Galaxy S21 5G and Samsung Galaxy A51
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