Was wondering if there is a difference between the quality/clarity of the glass between the Leupy VXR and VX-3 glass? I have two VX-3's and really like them. Was considering a VXR with a Firedot 4 reticle for night hunting. Interested in the illuminated dot. I have an older Muller Sportdot on my CZ 527 now that clouded up and wanted to upgrade.