The lack of a split folding rear seat seems like a pretty big oversight for a "premium" vehicle.
I might be wrong on this, but didn't Accords lack that for many, many years?
Accords still lack them (the 2013 Coupe at least, not sure about the sedan). Completely stupid way to cut costs IMO - you can't use the "structural integrity" argument, because the seat already folds down. So why not make it fully useful and do it 60/40?
And it makes no sense that the ILX doesn't have a 60/40 seat, when the Civic Si does.
So in my personal accounting ledger my these cars: Civic Si is more practical, has a real LSD, and is 4K cheaper. ILX has more features (power seats, leather), a much nicer interior, and classier exterior (to me). Both have great powertrains, but poor gearing.
End result: Both vehicles have fairly significant compromises and I probably wouldn't buy either one.
Perhaps the Civic Si's shortcomings can be fixed somewhat for the 2013 "refresh"?