Actually, since higan/bsnes came out, A LOT of its accuracy fixes have been integrated into ZSNES and SNES9x for a better compatibility with obscure games and accurate ROM hacks. They still aren't perfect, but now even the more obscure games run on them pretty well, without the need for insane accuracy - so there's very high compatibility with their Android versions.
Being a bit of an accuracy freak, I would still take higan over them any day of the week - but if you're limited on resources or just want to play on the go, they aren't THAT bad of an alternative ever since they've started copying from higan.