Outside of the MvC2 one Welt mentioned, pretty much not. All of them use the same OBSF30 buttons/JLF sticks, the only real differences are that some models have PCBs that lends themselves slightly better to dualmodding and some of the earlier SF4 ones have a crappy wiring harness, but that's like a $3 part to replace from LizardLick.
tbh a lot of the time GameStop actually has the best deals on MadCatz sticks, at least for in-store ones.
I've also been looking heavily at this: http://etokki.com/Omni-Sanwa-Edition
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