... um, wait, what?
falco is just miles easier than fox. falco is much much easier to combo, so the only hard part is getting him up to combo percentages. utilt / uair / nair do that just fine. the former two trade or win with any of falco's attacks. nair out of shield is much more effective v falco than fox because falco's much more predictable and slower.
dude, fox ***** like all the random stages and has a million counterpicks that destroy sheik. basically if the fox knows what you're doing, you're already starting 0-1 and have to win the first match and your counterpick. sheik has no chance v fox on gay crap like green greens or poke floats. fox ***** on PS, FD and YS and while sheik has an advantage on BF and FoD, it's not nearly the advantage sheik has on a falco on those stages. so 3/5 of the time you're coming from behind from the random stages, and fox can ban sheik's best stage (FoD) which hurts sheik much more than banning FD hurts fox. (MLG rules don't let you ban randoms and in so cal we play by MLG rules so we can't even ban neutrals anyway.)
a campy fox that plays as gay as possible >>>>>>>>> sheik. falco can play as gay as possible and it's uphill but still not that bad because unlike fox he can't hit and run, he has to play aggressive and he has to be much more predictable to an extent than fox. fox can literally laser, nair shine and run away, and just punish your mistakes with drill shine to grab to uair all day long. toss in some usmash out of shield and a much better edge guarding game than falco and i'll take falco over fox any time.