| Manufacture | Sony | Motorola |
| Model | Xperia U | Rival A455 |
| Form factor | Block | QWERTY Slider |
| Weight | 110 gram | 125.00 |
| Dimensions (HxWxD) | 112 x 54 x 12 | 97.00 x 51.00 x 18.00 |
| Operating System | Android | Other |
| Networks | 2G - 850/900/1800/1900
3G - 900/2100 | 2G - 800/1900
|
| HSCSD |  | |
| GPRS |  | |
| EDGE | | |
| UMTS | | NA |
| HSDPA | | NA |
| HSPA+ | | |
| WiMAX | | |
| LTE (4G light) | | |
| WLAN / Wi-Fi | | |
| Wi-Fi Hotspot | | |
| Wi-Fi Direct | | |
| SMS | | |
| MMS | | |
| Email | | |
| HDMI out | | |
| USB port | | |
| MHL | | |
| Bluetooth | | |
| Bluetooth version | 3.0 | NA |
| DLNA | | |
| GPS | | |
| Glonass | | |
| ANT+ | | |
| IrDA | | |
| NFC | | |
| 3.5 mm audio connector | | |
| Camera | | |
| Camera resolution | 5 megapixel, autofocus, 16x digital zoom, face detection | 2 megapixel, 7x digital zoom |
| Image Stabilization | | |
| BSI sensor | | |
| Camera Flash/Light | | |
| Flash type | NA | NA |
| Video recording | | |
| Video capture resolution | 720p | NA |
| Second Camera | VGA (640 x 480) | NA |
| Display size | 3.5 inches | 2.20 |
| Touchscreen | | |
| Colour display | | |
| Number of colours | 16000000 | 65000 |
| Display width | 480 | 176 |
| Display height | 854 | 220 |
| PPI | 279.9 | 128.06 |
| Second Display | NA | NA |
| CPU | 1 GHz dual core ST-Ericsson U8500 processor | NA |
| GPU | DB8500 | NA |
| Memory | 512 MB. 4 GB storage. Expandable up to 32 GB using microSD card | 179 MB. Expandable up to 8 GB |
| Micro SIM | | |
| Dual SIM | | |
| MP3 | | |
| Ringtones / Music file format | MP3, AAC, WMF, WAV, OTA, OGG | MP3, MIDI, WAV |
| Java | | |
| Games | Yes | NA |
| FM Radio | | |
| Battery | 1320 mAh | NA |
| Standby time (h) | 472 | 510 |
| Talktime (m) | 396 | 320 |
| Wireless Charging | | |
| Browser | Android HTML Webkit | NA |
| Calendar | | |
| Voicedialing | | |
| IP Code | NA | NA |
| Predictive text | | NA |
| RSS reader | | NA |
| Voicememo | | |
| PC Synchronization | | NA |
| SyncML | | NA |
| Website | Website | Website |
