Oppo F3

In the F3, you get a more compact 5.5-inch screen of the same 1080p resolution. It's easier on the hand and the pocket, and adds some extra sharpness too. However, the switch to a less potent Mediatek MT6750T chipset affects its performance. The 13MP main camera is a slight downgrade too, video capture is capped at 1080p and there's a smaller 3,200mAh battery.

Oppo F3 key features:

Body: Aluminum unibody, Gorilla Glass 5, 153.3 x 75.2 x 7.3mm, 153g
Screen: 5.5 inches, IPS LCD with 1080 x 1920 pixels resolution (401ppi)
Chipset: Mediatek MT6750T octa-core CPU (8x1.5 GHz Cortex-A53), Mali-T860MP2
Memory: 4GB of RAM plus 64GB of inbuilt storage; microSD slot (dedicated)
Camera: 13MP, f/2.2, 1/3" sensor with phase detection autofocus and a single LED flash
Selfie cam: Dual, 16MP, f/2.0, 1/3" sensor size + 8 MP 120-degree, f/2.4
OS: ColorOS 3.0, running on top of Android 6.0 Marshmallow
Battery: 3,200mAh Li-Ion (sealed)
Connectivity: Dual-SIM (Nano-SIM, dual stand-by); LTE Cat4 150/50 Mbps; Wi-Fi a/b/g/n; Bluetooth v4.1, A2DP, LE;
Misc: Front-mounted fingerprint reader