What brand are your boots? I learned the hard way that sometimes boots only fit well wth bindings of the same brand.
If they're ThirtyTwo, Vans, Nike or another boot-only brand, they'd fit with most bindings but would fit best with binding-specific brands such as Union.
Right now I have a pair of Ride boots and a pair of Union DLX bindings, and although they do fit, they don't fit well together. One of the reasons I'm getting a pair of ThirtyTwo boots is to solve this problem.
If you can't decide between 2 or more certain bindings, you should consider which will fit best with your boots, if you haven't already. That's usually a good deciding factor.
They're nikes. I have tried both on with my boots and they both fit just fine, just trying to see if someone can sway me one way or another because from what i've been reading they're both solid bindings