Good question. I think that the HHX will blend more, but the Fast Hats will cut more. It depends on what fits your music the best. For me, I have three sets of hats - Zildjian's 12" A Custom Mastersound, Sabian's 13" AAX Fusion Hats, Sabian's 13" HHX Groove Hats. For church, I'm using the AAX Fusion Hats because I feel that they fit the music better than the Grooves, but I will try them for a month to see how they fare.