You asked
Leica sl2 s vs nikon z5?
Both of these are full-frame mirrorless cameras announced in 2020, with 24-megapixel sensors and in-body stabilisation. On paper they're close, so the choice comes down to mount, lenses, and what you shoot.
The Leica SL2-S uses L-Mount and my page describes it as better suited to low light and video. The Nikon Z5 uses the Nikon Z mount, and its lens catalogue is longer, with more native options at most focal lengths.
If you want more resolution, look at the Leica SL2, which has a 47-megapixel sensor.
Written by Claude from this site's pages.