Oppo both devices share similar specs except for minor changes. However, Oppo Reno6 5G costs Rs.21,999 higher than the Oppo F19 Pro Plus 5G due to certain reasons.
Design and display
Both the devices have the same design available in various colors and talking about display sizes they are almost the same 6.4 inches (1080 x 2400 pixels) AMOLED display
1080 x 2400 pixels
409 ppi
Android v11
MediaTek Dimensity 800U MT6853V
MediaTek Dimensity 900 MT6877
5G
Rear: Triple, 48MP + 8MP + 2MP + 2MP
Rear: Triple, 64MP + 8MP + 2MP
4310 mAh
Performance
Both devices run on the Android v11 octa-core CPU. However, Oppo F19 Pro uses MediaTek Dimensity 800U MT6853V chipset with Mali-G57 MC3 GPU while Oppo Reno6 5G uses MediaTek Dimensity 900 MT6877 chipset with Mali-G68 MC4 GPU
Camera
The Oppo Reno6 has high-resolution rear (64MP+8MP+2MP) and front (32MP) cameras compared to Oppo F19 Pro Plus 5G rear (48MP+8MP+2MP+2MP) and front (16MP) camera.
Battery
The battery capacity of both devices is the same 4310 mAh. However, Reno6 5G has better charging speed than the Oppo F19 Pro Plus 5G
Which one you should Buy?
Both devices offer almost the same features. As well both of them are backed by capable mid-range processors.
However, the Oppo Reno6 5G is a better choice as it has many better parts like Internal Storage, RAM, and a good Camera.