Been reading DC since the early 80s. Aqua man is still a joke and hate to burst your bubble but Supes has been shown time and again to be faster than flash (atleast when they race). And let's me fair here, all Supes has to do is land one real punch and anyone who doesnt have some kind of invulnerability is obliterated.
Plus all that really doesn't matter when he can hang out in orbit and heat beam you whole you are on the pot taking your morning dump.