What would you say is different?

When shooting in the hybrid mode, you get the OVF with frame lines and the centre phase shift overlay.

Imho that’s basically the same experience as any Leica rangefinder I’ve used.

Maybe the rest of the experience is different (interchangeable lens, body) but I think the rangefinder experience is very well replicated.

Some people love the physical focus tab on the Leica that makes it possible to focus using muscle memory: https://youtu.be/mH1t9cvNb08

Difficult to put into words, superior attention to detail and mechanical and optical quality is the closest thing to an explanation I can think of.

You can't beat an optical range finder by cheating, there's just no way.