SL3

I suggest in this case to rent both (get an SL3 from Leica, an S1Rii from Panasonic) and test for yourself. This is a specific question that probably not many have looked into. I assume you will be fine with both and that the lens will matter more.

With Sony the problem is that only A1 is mind blowing… ZF is just not Sony type of small, and looks better than it feels in the hand; the older generation z6/7ii was a bit smaller but performance wasn’t there and especially for manual lenses it was noticeable how bad the viewfinder is. I’d say no im