Looks like it's the exact same design (the notch on the button overlay is a giveaway).
Played with it a bit this evening and aside from being spoiled by more fitting controller shapes, I couldn't reliably nail my special moves in Super Street Fighter II (my favorite test case). I honestly don't know if it's just me or what; I haven't played with a SNES controller in over a decade due to emulation maturity and other controller options (I fucking love my Saitek P2500 more than any SNES controller).
It's a fun little novelty, but I don't know if I could play a full game with it. I'll try a few more games with it and then my old hands are going back to something that doesn't aggravate my old, broken ass hands.