I know this is an old thread but I wanted to chime in here with some feedback. I've used the Vortex Razor HD 12x50 for a couple years now and just recently picked up the Maven B.6 12x50. My intent was to compare and keep the binos I liked the most, selling the others.
They are close. In this price range of glass both are solid options and I think either would serve well, but it was indeed a win for the Mavens in my opinion. Clarity and color were slightly better with the Mavens, and brightness even more so.
Additionally...someone said this in an earlier reply, which didn't initially make sense to me but looking through both it does now...the Mavens are just "easier to get behind". They aligned quicker and easier, seemed to have better field of view and more efficient "target acquisition". This all could be personal preference and perception but I just wanted to say I agree with the "easier to get behind" comment.
Lastly, the Maven build quality seems a bit more robust vs. the Vortex. This comes with some cost, as the Vortex are indeed lighter weight and the Mavens heavier.
Again it was close, the Vortex Razor HD were by no means sub-par, I like them, I just feel the Maven B.6 have the edge.