Deore is one notch higher than Sora. I wouldn't pick based on the front derailleur, they are so basic that they don't make any difference in shift quality IME. The Sora RD will limit you to a 27-28T granny (low) geared cassette. Combine that with a 50/34 crank and you will be struggling on steeper climbs, especially if you're out of shape. If you live in flatlands this won't matter. I'd go with the Deore bike though, better RD and you have a triple with up to a 34T low geared cassette if you want it which is the best of both worlds on a hybrid. Remember, cassettes are relatively cheap ($25-30) and easy to replace so I wouldn't rule out a bike based on which cassette comes stock.
Last edited by Dunbar; 05-23-12 at 09:23 PM.