Both are equivalently good but, G4 has a better camera on paper, its camera can take in more light in low light environments its 1.8 aperture with laser focus where as the oneplus 3 comes with only 2.0 aperture but in reality the OnePlus 3 takes better photographs than the G4 watch a few video’s on and Oneplus 3 Vs G4 camera on youtube and be a better judge