I have looked through both.  I just don't like the Leica bino's.  I have looked through normal Leica's and they just don't feel comfortable to me.  I use the Leica RF though.  I have also looked through the Leupold, and they are really poor bino's IMO.  The Leupold's are huge, funky width, and focus adjustment.  They work but pretty cheap glass.