Samsung
Samsung Galaxy Alpha
Huawei
Huawei Honor 3C

Sony
Sony Xperia C3

Features
Accelerometer, heart rate
ANT+, Fingerprint (front-mounted), gyro, proximity, Compass, Yes, Yes, Yes, SMS (threaded view), MMS, Email, Push Mail, IM, RSS
Accelerometer, proximity, compass, SMS (threaded view), MMS, Email, Push Mail, IM, RSS
proximity, Compass, Accelerometer, ANT+, SMS (threaded view), IM, MMS, Email, Push Email
Memory
No, 32 GB internal storage, 2 GB RAM
microSDHC (dedicated slot), 8GB 2GB RAM
eMMC 4.5, microSDHC (dedicated slot), 8GB 1GB RAM
Display
Corning Gorilla Glass 4, 16:9 ratio (~312 ppi density), 720 x 1280 pixels, Super AMOLED capacitive touchscreen, 4.7 inches (~320 ppi pixel density), 720 x 1280 pixels, 16 M colors
720 x 1280 pixels, 16:9 ratio (~294 ppi density), IPS LCD capacitive touchscreen, 5.0 inches, 68.9 cm2 (~69.2% screen-to-body ratio)
720 x 1280 pixels, 16:9 ratio (~267 ppi density), IPS LCD capacitive touchscreen, 5.5 inches, 83.4 cm2 (~67.8% screen-to-body ratio), 16 M colors
Battery
Up to 11 h (3G), Up to 350 h (3G), Up to 37 h, Li-Ion 1860 mAh, removable
Li-Po 2300 mAh, removable
Up to 11 h (2G) / Up to 25 h (3G), Up to 1040 h (2G) / Up to 1000 h (3G), Up to 67 h, Non-removable Li-Ion 2500 mAh
Selfie Camera
2.1 MP
5 MP, f/2.4, 22mm (wide)
LED flash, 5 MP, f/2.3, 720p
Main Camera
720p@120fps, 4K@30fps, 1080p@60fps, LED flash, HDR, Panorama, f/2.2, 31mm (standard), 12 MP, AF
1080p@30fps, LED flash, 8 MP, f/2.0, 28mm (wide), AF
1080p, HDR, HDR, Panorama, LED flash, 8 MP, f/2.3, AF