After having owned both, the only advantage I can come up with in this Summit vs VX6 is that the Summit has slightly better glass. The glass on the 2-12x is excellent too though, and the reticle, eye relief at all powers, ease of use, etc are all better with the Vx6. The plex reticle on the summit is way to thin IMO, so mine went down the road.
If you're not too concerned with dialing elevation, I'd also look hard for a meopta R2 1.7-10x.
Good luck, and have some fun with it.
