There are a few different Vx-2 Ultralights, so I guess the answer depends on which model you are thinking about. I can't speak to the variable power Ultralight line, but I have a FX-2 Ultralight 2.5x20 on my 308 Win. Tikka T3 Battue Lite. The scope is mounted on a QD mount, with a second identical mount that has a FX-II 4x33 on it. The Ultralight is definitely lighter, great when walking in bush if I choose to put it on (the 4x goes on in open areas.) I don't see any difference in optical quality between these two, or with other Leupolds I have. In other words, my experience with my Ultralight is positive. Your mileage may vary... .