i wouldn't say it's clearly tougher.
bama has toughest opp (fsu) but not significantly tougher than osu's toughest (psu) according to coaches rankings. likewise, osu has next 2 toughest opps (ou and mich), but not appreciably better (rankings wise) from lsu and au. and tenn is better and at minimum comparable to to neb, per rankings, so that's at least a wash.
biggest advantage osu has would be potential ccg matchups based o these rankings (wisky for osu, uga or uf for bama) and even those are only seperated by 5/6 spots right now.
these don't count surprises for either (ole miss, arky, aTm or msu, iowa).
looks pretty even to me. even the home/away is really close, with slight advantage to bama for playing fsu neutral v ou at home for osu.
mich schedule, on the other hand, is pretty tough based on rankings today. uf, wisky, osu, psu. 3 top 10's, plus the best opp, plus uf ooc, plus a ccg vs top10 wisky again (as per these rankings).
but, again, as we all know, these rankings won't hold for squat. and some teams that look daunting turn out to be also rans, while someone else is hiding in wait to pounce on cfb playoff.