The Voigtländer doesn't feel as nice and won't last as long, and the RF base is shorter, but these arguments are at least as important in persuading yourself that you need a Leica as in taking pictures. And, as Tony points out, you have the advantage with the Voigtländers that you don't get that bloody red dot.

That said, I still prefer my Leicas over my Voigtländers, even my olive drab R2.