I don't know. I go back and forth with my zflx heat. I love it for what it is, but it's so different than all of my other heats (Z and Big Z).
I don't know if I have a weird unicorn of a heat or what, because it's a disc that flies a lot more like a new thrasher: has a good amount of turn like all heats, but with a decent fade (unlike any of my other heats)
My beat-in z and big z heats fly like: 9/6/-3.5/0
My beat-in zflx heat flies like: 9/6/-2/2 It's a totally different disc and flies more like a glidier undertaker. It's cool for what it is, but the outlier in the mold. I only have one, so I can't compare it to any others.