Benq will have a better time with vertical tearing and motion blur, but the colours will be diabolical in comparison, and at 27" 1080p isn't really all that great. Personally moved from a VG278H (basically the same as the Benq, same 120/144Hz deal, crap colours, 'gaming' monitor) to a Qnix, haven't regretted the decision even in the slightest. The Qnix shits all over any TN display in terms of colours, has less input lag than my Asus (sounds like bull but I was surprised too), 1440p etc.
Choice is fairly obvious in my opinion, but to be fair the 96Hz of the Qnix isn't quite up to the same standard as the 144Hz the Benq is capable of, its not there in its ability to completely remove vertical tearing, where-as to my eyes 120Hz+ is.