Samsung Galaxy Ace 2 vs Samsung Galaxy A51 Dual SIM
| Type | Touch | Touch |
| Dimensions | 118.30 x 62.20 x 10.50 mm | 158.50 x 73.60 x 7.90 mm |
| Weight | 122.00 g | 172.00 g |
| Display size | 3.80" | 6.50" |
| Display | Color / PLS TFT 16M colors 480 x 800 px (3.80") 246 ppi | Color / Super AMOLED 16M colors 1080 x 2400 px (6.50") 405 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 980 min. (16.3 h) 3G: 450 min. (7.5 h) |  |
| Stand-by (max.) | 2G: 670 h. (27.9 days) 3G: 640 h. (26.7 days) | |
| Standard battery | Li-Ion 1500 mAhBuy powerbank
| Li-Ion 4000 mAhBuy powerbank
|
| Quick battery charging | | Fast Charging |
| Wireless battery charging | | |
| Internal memory | 4 GB | 128 GB |
| RAM memory | 768 MB | 4 GB |
| Memory cards |  microSD, microSDHC up to 32 GBBuy memory card | microSD, microSDHC, microSDXC up to 512 GBBuy memory card |
| Operating system | Android 2.3 Gingerbread | Android 10 |
| Interface | - | One UI 2.0 |
| Processor | ST-Ericsson NovaThor U8500 | Samsung Exynos 9611 |
| Processor clock | 800 MHz | 2300 MHz |
| GPU | ARM Mali-400 MP | ARM Mali-G72 MP3 |
| Touchscreen | | |
| DualSIM | | |
| SIM cards standard | | DualSIM(nanoSIM, nanoSIM) |
| DualSIM mode | nd | dual standby |
| Hybrid DualSIM | nd | |
| Announced | 2Q 2012 | 4Q 2019 |
| Other names | GT-i8160; GT-I8160l; GT-I8160p; Ace II | SM-A515F/DS; SM-A515F/DSM; SM-A515F/DSN; SM-A515F/DST |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 900 2100 | 850 900 1700 1900 2100 |
| LTE standard | | FDD LTE: 1900, 1700, 850, 700 TDD LTE: 2500 |
| Standard 5G | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Camera type | | Standard |
| Photo sensor model | | Sony IMX582 |
| Photo matrix | 5 Mpx | 48 Mpx |
| Sensor size | | 1/2,25 |
| Pixel size | | 0,8 µm |
| Resolution | 2592x1944 px | 8000x6000 px |
| Optical zoom | | |
| Flash | LED | LED |
| Dual-colour LED flash | | |
| Video resolution | 1280x720 px | 3840x2160 px |
| Video formats | H.263, H.264, MPEG4 | H.263, H.264, MPEG4 - 30 fps |
| Additional | - | AF, f/2.0 |
| Second camera | | |
| Camera type | nd | Wide-angle |
| Photo sensor model | nd | Hynix Hi-1336 |
| Photo matrix | nd | 13 Mpx |
| Sensor size | nd | 1/3 |
| Pixel size | nd | 1,12 µm |
| Resolution | nd | 4208x3120 px |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.2 |
| Third camera | | |
| Camera type | nd | Macro |
| Photo sensor model | nd | GalaxyCore GC5035 |
| Photo matrix | nd | 5 Mpx |
| Sensor size | nd | 1/5 |
| Pixel size | nd | 1,12 µm |
| Resolution | nd | 2952x1944 px |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.2 |
| Fourth camera | | |
| Camera type | nd | Depth of field |
| Photo sensor model | nd | GalaxyCore GC5035 |
| Photo matrix | nd | 5 Mpx |
| Sensor size | nd | 1/5 |
| Pixel size | nd | 1,12 µm |
| Resolution | nd | 2952x1944 px |
| Optical zoom | nd | |
| Flash | nd | LED |
| Dual-colour LED flash | nd | |
| Video formats | nd | H.263, H.264, MPEG4 - 30 fps |
| Additional | nd | FF, f/2.4 |
CAMERAS - FRONT
| First camera | | |
| Camera type | | Portrait |
| Photo sensor model | | Sony IMX616 |
| Photo matrix | 0.3 Mpx | 32 Mpx |
| Sensor size | | 1/2,8 |
| Pixel size | | 0,8 µm |
| Resolution | 640x480 px | 6528x4896 px |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video formats | H.263, H.264, MPEG4 | H.263, H.264, MPEG4 - 30 fps |
| Additional | - | FF, f/2.2 |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | 14.40 Mbit/s | 42.20 Mbit/s |
| HSUPA | 5.76 Mbit/s | 5.76 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | 603.00 Mbit/s |
| LTE UP | | - |
| WIMAX+ | | |
| GPRS | class 12 | |
| EDGE | class 12 | |
| Bluetooth | v3.0 | v5.0 |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g/n | v802.11 a/b/g/n/ac |
| WiFi frequencies | 2,4 GHz | 2,4 GHz; 5 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v2.0 Type-C |
| GPS | | |
| A-GPS | | |
| GLONASS | | |
| Beidou | | |
| Galileo | | |
| QZSS | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | T9 | T9 |
| Swype | | |
| e-mail client | POP3, IMAP4, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | z RDS | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, AMR, FLAC, OGG, WMA, eAAC+ | 3GA, AAC, AMR, AWB, FLAC, IMY, M4A, MID, MIDI, MXMF, OGA, OGG, OTA, RTTTL, RTX, WAV, WMA, XMF |
| Polyphony | 72 voices | |
| Video ringtone | | |
| Ring composer | | |
| Games | | |
| Java | Dalvik | ART |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |