I think they are nearly equal in terms of aerials
nair-both them are quite good in most circumstances
fair-this is all the way fox,falco's lags too much upon landing and has little ko potential
bair-edge goes to falco since it's easier to pull off
uair-this one belongs to fox since it's easier to pull off with him and has better ko potential
dair-this is a really nice way to approach with fox but is not a good ko move.falco's on the other hand is a spike which makes it much more a threat.I give edge to falco
the main thing that separates falco and fox is the laser.fox's can't stun which really hurts him
PSN-intayaz