I would say N64 but I already voted for the SNES. Mainly its better because the parts are all a lot better held together.
SNES cartridges are a little loose in the slot which I think may be what caused my SNES to be partially broken. I have to play with some games to get them to work. Like I have to literally push down on them as hard as I can when I turn the system on and then ever so slowly ease up the pressure, and if the cartridge moves at all, the system freezes and I have to start over....
N64 however doesn't jiggle when I put it in the slot.
Keep in mind that it's been ages since I got SNES so I don't really remember how its supposed to be, maybe theres a part that me and my brothers broke or something, but it's definitely problematic so many years later.