Ike has: Superior range, superior KO power, superior disjoints, and a better jab.
We have: Superior zoning abilities, good gimp potential, and superior racking ability
I say 45-55 Ike's favor...
We go even in a lot of categories, but Ike's ability to keep us out of his bad zones and amazing KO power tips it in his favor.
Ike can only keep us out of his zones by retreating fairs
retreating towards the edge
eventually he has to roll or go over us (as long as we don't go and hurrrr derrrr lookatme i'ma rush him so he can get away) in which case we can initiate a juggle or get a kill
his disjoints don't matter because they're so slow and laggy (bar nair, which one of the only problems in the matchup) that we can punish, or he is forced to retreat towards the ledge
his jab is a problem, it puts pressure to push us out of his bad zones when we get in them, so we have to play smarter and outspace the jabs
his nair is by far the biggest problem, they are quick, cover his body, and little landing lag make it hard to punish, but utilt out ranges it AND jab, so you can practically walk up outside his nair/jab range and just utilt once, and if he goes for the fair just shield it and punish or he has to retreat
ike can't keep us out of his bad zones at all lol, we have shield, which beats all of ikes "stay out of my bad zone" moveset, lern2walk + shield attacks and you'll find that ike really does suck
he kills us fast, we gimp him easily
etc
as long as you ban battlefield this matchup is pretty easy for falcon, FD > ike