LG
LG Optimus G LS970

LG
LG Viper 4G LTE LS840

Features
Accelerometer, gyro, proximity, compass, - MP4/H.264/WMV/DviX player, - MP3/WMA/WAV/FLAC/eAAC+ player, - Document viewer/editor, - Organizer, - Voice memo/dial/commands, - Predictive text input
Accelerometer, gyro, proximity, compass, - MP4/H.264/WMV/DviX player, - MP3/WMA/WAV/FLAC/eAAC+ player, - Photo viewer/editor, - Document viewer/editor, - Organizer, - Voice memo/dial/commands, - Predictive text input
Accelerometer, proximity, compass, - MP4/H.264/WMV player, - MP3/WAV/WMA/eAAC+ player, - Document viewer, - Organizer, - Voice memo/dial, - Predictive text input (Swype)
Memory
No, 32 GB, 1 GB RAM
No, 32 GB, 2 GB RAM
microSD, up to 32 GB (dedicated slot), 4 GB included, 4 GB (1.7 GB user available), 1 GB RAM
Display
768 x 1024 pixels, 4:3 ratio (~256 ppi density), HD-IPS LCD capacitive touchscreen, 16M colors, 5.0 inches, 77.4 cm2 (~61.3% screen-to-body ratio)
768 x 1280 pixels, 5:3 ratio (~318 ppi density), True HD-IPS + LCD capacitive touchscreen, 16M colors, 4.7 inches, 62.9 cm2 (~69.2% screen-to-body ratio), - LG Optimus UI v3.0
480 x 800 pixels, 5:3 ratio (~233 ppi density), TFT capacitive touchscreen, 16M colors, 4.0 inches, 45.5 cm2 (~62.8% screen-to-body ratio)
Battery
Up to 16 h 30 min (2G) / Up to 15 h (3G), Non-removable Li-Ion 2100 mAh battery, Up to 510 h (2G) / Up to 486 h (3G)
Up to 13 h, Non-removable Li-Po 2100 mAh battery
Up to 7 h, Removable Li-Ion 1700 mAh battery
Main Camera
1080p@30fps, LED flash, 8 MP, AF
1080p@30fps, LED flash, 13 MP, AF
1080p@30fps, LED flash, 5 MP, AF