I was a Betatester of the M10-P. I wrote a little review fin the German forum:
https://www.l-camera-forum.com/topic/287695-m10-p-the-sound-of-silence/?p=3576276
Sorry, but my English is not good enough to translate it. Because of that I restrict myself here to the little film of my shutter noise comparison between the M10 and the M10-P.
The pictures of a sound analysis of our forum-friends Mathias („schattenundlicht“) and Uli („UliWer“) You can find here:
#3