>>3788638I own a Z5, and shoot stills only.
The Z6 has a top LCD, BSI sensor, 12 fps, and higher res rear LCD.
But the Z5 has somewhat better battery life, dual traditional SD card slots, and you save some money.
Also, the Z5's non-BSI sensor supposedly is slightly better at base ISO, according to some conspiracy theorists.
I don't know about the Z6, but the Z5's autofocus is miserable in low light compared to my D750 - really puts me off the whole camera.