A quick specifications comparison between the Leica M10, Leica M10P, Leica M10M, and Leica M10R can be found here:
Leica M10-R pre-orders links:
A quick specifications comparison between the Leica M10, Leica M10P, Leica M10M, and Leica M10R can be found here:
Leica M10-R pre-orders links: