hi,
If they are different professors, than decide which prof you will like better. other than that, it's not too different. I'd then look at final exam dates. and then i'd think about lab, and who you might be stuck with for lab partners and such (if you know others taking orgo). and, 1.5 vs 1 hr depends on your style, mostly. Is it nicer for you not to have classes friday, maybe, or does one section block all office hours for another prof.
yeah, if there are exam differences think about that.
you actually HAVE multiple sections? wow.
Sonya