Form Factor
Body
Side-Slider, Querty Keyboard, Touchscreen	Side-Slider, Querty Keyboard, Touchscreen
Dimensions
111 x 55 x 15.2 mm (4.37 x 2.17 x 0.60 in)	109.5 x 57.5 x 15 mm (4.31 x 2.26 x 0.59 in)
Weight
117 g (4.13 oz)	145 g (5.11 oz)
Build
	Touch-sensitive trackpad
Colors
Black	Black

Type
Display
TFT TouchWiz 3.0 UI	TFT MOTOBLUR UI with Live Widgets
Size
3.2 inches, 29.1 cm² (~47.7% screen-to-body ratio)	3.1 inches, 28.6 cm² (~45.4% screen-to-body ratio)
Resolution
240 x 400 pixels, 5:3 ratio (~146 ppi density)	320 x 480 pixels, 3:2 ratio (~186 ppi density)
Multitouch
	Yes

Alert Types
Notifications
Vibration, MP3, WAV ringtones	Vibration, MP3, WAV ringtones

Internal Memory
Memory
160MB	512MB ROM, 512MB RAM
Storage Type
DNSe sound enhancement
Card Slot
microSDHC (dedicated slot), 1 GB included	microSDHC (dedicated slot), 2 GB included
Phonebook
Practically unlimited entries and fields, Photocall
Call Records
Practically unlimited

Operating System (OS)
Software
Android OS, v2.2 (Froyo)	Android OS, v2.2 (Froyo)
Upgradable
upgradable to v2.3.6 (Gingerbread)
Java
Yes, via Java MIDP emulator	Yes, via Java MIDP emulator
Browser
HTML	HTML, Adobe Flash Lite
Messaging
SMS(threaded view), MMS, Email, Push Email, IM	SMS(threaded view), MMS, Email, IM, Push Email
Games
Downloadable

Chipset
Hardware
Qualcomm MSM7227 Snapdragon S1	TI OMAP 3410
CPU
600 MHz	720 MHz Cortex-A8
GPU
Adreno 200	PowerVR SGX530
Sensors
Accelerometer, proximity, compass	Accelerometer, proximity, compass
Keyboard
QWERTY	QWERTY
Soft Keys
2
SIM
Mini-SIM	Mini-SIM
Speakers
Yes	Yes
Navigation / Controls Keys
D-Pad
Audio Jack
3.5 mm	3.5 mm

Features
Additional Features
Document viewer	Document viewer Photo viewer/editor Voice memo/dial/commands Predictive text input (Swype)

Samsung Galaxy 551

Motorola FLIPSIDE MB508