The Samsung Galaxy A91 and A51 5G UW represent different approaches to the mid-range market. The A91, released with a flagship-tier Snapdragon 855, aimed for raw power. The A51 5G UW, leveraging the Snapdragon 765G, prioritized 5G connectivity and efficiency. This comparison dissects their key differences to determine which device delivers the best experience for your needs.
🏆 Quick Verdict
For users prioritizing sustained performance and faster charging, the Samsung Galaxy A91 is the clear winner. Its Snapdragon 855 offers a significant performance advantage over the A51 5G UW’s Snapdragon 765G. However, the A51 5G UW provides a more balanced package with 5G connectivity at a potentially lower price point.
| Network |
|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | GSM 850 / 900 / 1800 / 1900 |
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | HSDPA 850 / 900 / 1900 / 2100 |
| 4G bands | LTE | 2, 4, 5, 13, 66 |
| 5G bands | - | 260, 261 mmWave |
| Speed | HSPA 42.2/5.76 Mbps | HSPA, LTE, 5G |
| Technology | GSM / HSPA / LTE | GSM / HSPA / LTE / 5G |
| Launch |
|---|
| Announced | Not announced yet | 2020, August 14 |
| Status | Cancelled | Available. Released 2020, August 14 |
| Body |
|---|
| Build | - | Glass front (Gorilla Glass 3), plastic back, aluminum frame |
| Dimensions | - | 158.8 x 73.4 x 8.6 mm (6.25 x 2.89 x 0.34 in) |
| SIM | · Nano-SIM· Nano-SIM + Nano-SIM | Nano-SIM (pre-installed) |
| Weight | - | 188.8 g (6.67 oz) |
| Display |
|---|
| Protection | - | Corning Gorilla Glass 3 |
| Resolution | 1080 x 2400 pixels, 20:9 ratio (~393 ppi density) | 1080 x 2400 pixels, 20:9 ratio (~405 ppi density) |
| Size | 6.7 inches, 108.4 cm2 | 6.5 inches, 102.0 cm2 (~87.5% screen-to-body ratio) |
| Type | Super AMOLED | Super AMOLED |
| | Always-on display | - |
| Platform |
|---|
| CPU | Octa-core (1x2.84 GHz Kryo 485 & 3x2.42 GHz Kryo 485 & 4x1.78 GHz Kryo 485) | Octa-core (1x2.4 GHz Kryo 475 Prime & 1x2.2 GHz Kryo 475 Gold & 6x1.8 GHz Kryo 475 Silver) |
| Chipset | Qualcomm SM8150 Snapdragon 855 (7 nm) | Qualcomm SM7250 Snapdragon 765G 5G (7 nm) |
| GPU | Adreno 640 | Adreno 620 |
| OS | Android 10, One UI | Android 10, One UI 2 |
| Memory |
|---|
| Card slot | microSDXC | microSDXC (uses shared SIM slot) |
| Internal | 128GB 8GB RAM | 128GB 6GB RAM |
| | - | UFS 2.1 |
| Main Camera |
|---|
| Features | LED flash, panorama, HDR | LED flash, panorama, HDR |
| Quad | - | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF
12 MP, f/2.2, 123˚ (ultrawide)
5 MP (macro)
Auxiliary lens |
| Single | - | 5 MP, AF |
| Triple | 48 MP, f/2.0, 26mm (wide), 1/2.0", 0.8µm, PDAF, OIS
12 MP, f/2.2, 12mm (ultrawide), 1.12µm
Auxiliary lens | - |
| Video | 4K@30fps, 1080p@30/60fps (gyro-EIS), 720p@960fps | 4K@30fps, 1080p@30/120fps; gyro-EIS |
| Selfie camera |
|---|
| Features | HDR | HDR |
| Single | 32 MP, f/2.2, 25mm (wide), 1/2.8", 0.8µm | 32 MP, f/2.2, 26mm (wide), 1/2.8", 0.8µm |
| Video | 1080p@30fps | 4K@30fps, 1080p@30fps |
| Sound |
|---|
| 3.5mm jack | No | Yes |
| 35mm jack | No | Yes |
| Loudspeaker | Yes | Yes |
| Comms |
|---|
| Bluetooth | 5.0, A2DP, LE | 5.0, A2DP, LE |
| NFC | No | Yes |
| Positioning | GPS, GLONASS, GALILEO, BDS | GPS, GLONASS, GALILEO, BDS |
| Radio | - | FM radio, RDS, recording |
| USB | USB Type-C 2.0 | USB Type-C 2.0, OTG |
| WLAN | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct |
| Features |
|---|
| Sensors | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass | Fingerprint (under display, optical), accelerometer, gyro, proximity, compass |
| | Samsung DeX (desktop experience support)
ANT+ | ANT+ |
| Battery |
|---|
| Charging | 45W wired | 15W wired |
| Stand-by | - | Up to 672 h |
| Talk time | - | Up to 5 h |
| Type | Li-Po 4500 mAh, non-removable | Li-Po 4500 mAh |
| Misc |
|---|
| Colors | White, Black | Prism Bricks Blue |
| Models | SM-A915F | SM-A516V |
| Price | - | About 470 EUR |
| SAR | - | 0.70 W/kg (head) 1.25 W/kg (body) |
| SAR EU | - | 0.59 W/kg (head) 1.32 W/kg (body) |
Samsung Galaxy A91
- Significantly faster processor with Snapdragon 855
- 45W fast charging for quick power-ups
- Potentially superior camera performance due to ISP and sensor size
- Likely less power efficient than the Snapdragon 765G
- May be harder to find and potentially more expensive
Samsung Galaxy A51 5G UW
- Integrated 5G connectivity
- More power-efficient Snapdragon 765G chipset
- Potentially lower price point
- Noticeably slower processor compared to the Snapdragon 855
- Slower 15W charging
Display Comparison
While display specifications aren't provided, the A91, positioned as a higher-tier device, likely featured a Super AMOLED panel with a higher peak brightness than the A51 5G UW. The A51 5G UW, being a more mainstream model, likely utilized a standard AMOLED panel. The difference in display quality would be noticeable in direct sunlight, with the A91 offering better visibility. Both likely featured FHD+ resolutions, but the A91 may have had a slightly higher pixel density.
Camera Comparison
Without detailed camera specs, it’s difficult to make a definitive judgment. However, given the A91’s higher positioning, it likely featured a larger main sensor and potentially more advanced image processing algorithms. The Snapdragon 855’s ISP (Image Signal Processor) is also more capable than the 765G’s, allowing for faster image capture and better low-light performance. The A51 5G UW would likely focus on providing a versatile camera experience with a range of lenses, but the A91 would likely excel in image quality, especially in challenging conditions.
Performance
The core difference lies in the chipsets. The Galaxy A91’s Snapdragon 855 (7nm) boasts a more powerful CPU configuration – an octa-core setup with a 2.84 GHz Kryo 485 prime core – compared to the A51 5G UW’s Snapdragon 765G (7nm) with its 2.4 GHz Kryo 475 Prime core. This translates to significantly faster processing speeds for the A91, particularly in CPU-intensive tasks. The 855’s Adreno 640 GPU also provides a substantial graphical performance boost over the 765G’s Adreno 620. While both utilize 7nm fabrication, the 855’s architecture is geared towards higher peak performance, potentially at the cost of some efficiency. The A51 5G UW’s 765G prioritizes a balance between performance and power consumption, making it suitable for everyday tasks and moderate gaming.
Battery Life
Battery capacity isn't specified, but the A91’s 45W wired charging is a significant advantage. This allows for a much faster 0-100% charge compared to the A51 5G UW’s 15W charging. Even if the A51 5G UW had a slightly larger battery, the A91’s faster charging would minimize downtime. The Snapdragon 765G’s efficiency could offset some of the A91’s charging advantage in real-world usage, but the A91’s ability to quickly top up is a major convenience factor.
Buying Guide
Buy the Samsung Galaxy A91 if you need uncompromising performance for demanding tasks like gaming or video editing, and value the convenience of 45W fast charging. Buy the Samsung Galaxy A51 5G UW if you prioritize 5G connectivity, a more efficient chipset for all-day battery life, and are willing to trade some processing power for a potentially lower price.
Frequently Asked Questions
❓ Will the Snapdragon 765G in the A51 5G UW handle demanding games like PUBG or Call of Duty?
The Snapdragon 765G is capable of running PUBG and Call of Duty, but you’ll likely need to lower graphics settings for a smooth experience. The A91’s Snapdragon 855 will provide a significantly smoother and more consistent gaming experience at higher settings.
❓ How much faster is the 45W charging on the A91 compared to the 15W charging on the A51 5G UW?
The 45W charging on the A91 can potentially charge the phone from 0-100% in around an hour, while the A51 5G UW’s 15W charging could take over two hours. This difference is substantial and provides a significant convenience advantage for the A91.
❓ Does the Snapdragon 855 in the A91 get noticeably hotter during extended use compared to the A51 5G UW?
The Snapdragon 855 is known to generate more heat under sustained load than the Snapdragon 765G. While Samsung likely implemented thermal management solutions, the A91 may experience some throttling during prolonged gaming or video recording sessions, potentially impacting performance.
