Samsung
Samsung Galaxy Ace S5830I
Samsung
Samsung I9003 Galaxy SL

Samsung
Samsung I997 Infuse 4G

Features
Accelerometer, proximity, compass
Accelerometer, proximity, compass, - MP4/DivX/WMV/H.264 player, - MP3/WAV/eAAC+/AC3/FLAC player, - Photo/video editor, - Document editor, HTML, Adobe Flash
Accelerometer, proximity, compass, - MP4/DivX/WMV/H.264 player, - MP3/WAV/eAAC+/FLAC player, - Organizer, - Photo/video editor, - Voice memo/dial/commands, - Predictive text input (Swype), HTML, Adobe Flash
Memory
microSD, up to 32 GB (dedicated slot), 158 MB
microSD, up to 32 GB (dedicated slot), 4/16 GB, 478 MB RAM
microSD, up to 32 GB (dedicated slot), 2 GB included, 16 GB
Display
Corning Gorilla Glass, 320 x 480 pixels, 3:2 ratio (~165 ppi density), TFT capacitive touchscreen, 16M colors, 3.5 inches, 36.5 cm2 (~54.2% screen-to-body ratio)
Corning Gorilla Glass, 480 x 800 pixels, 5:3 ratio (~233 ppi density), SC-LCD capacitive touchscreen, 16M colors, 4.0 inches, 45.5 cm2 (~57.3% screen-to-body ratio)
Corning Gorilla Glass, 480 x 800 pixels, 5:3 ratio (~207 ppi density), Super AMOLED Plus capacitive touchscreen, 16M colors, 4.5 inches, 57.6 cm2 (~61.5% screen-to-body ratio), TouchWiz 3.0 UI,
Battery
Up to 11 h (2G) / Up to 6 h 30 min (3G), Removable Li-Ion 1350 mAh battery, Up to 640 h (2G) / Up to 420 h (3G)
Up to 15 h (2G) / Up to 7 h 30 min (3G), Removable Li-Ion 1650 mAh battery, Up to 610 h (2G) / Up to 550 h (3G)
Up to 8 h, Removable Li-Ion 1750 mAh battery, Up to 400 h
Main Camera
Yes, LED flash, 5 MP, AF
720p@30fps, 5 MP, AF
720p, LED flash, 8 MP, AF