SNES carts doesn't ever have any 3DFX chip. I think you're talking about the SuperFX 1 & 2 chips that a few games had, but have nothing to do with 3DFX, which appart from the PC gfx cards & chips, was a 3D API, totally dicontinued. The generated polygons by the SuperFX chip wasn't noticeable to the SNES, it worked on its own, so it was not real 3D.
You might look at
SNES &
GBA tech docs to see it have nothing to do each other. The GBA CPU it's a ARM7TDMI working at 32-bit, which it's more similar to the PSX CPU than any 16-bits one. It has real 3D though basic capabilities that never had the SNES nor with the SuperFX chips.