The later R2 etc have a more substantial feel for sure, buy basically the same camera underneath. They are all a bit cheap and cheerful compared to a M Leica, but of course they are cheap and cheerful!
The thing is that the R and the L and T all work really well, excellent metering and nice bright and contrasty viewfinder (in the R that is).
At the price point, the cameras and most definitely, the lenses, all perform well above their weight. Great intro into RF photography, with the SM cameras being much cheaper to buy these days.