Ride both for a while and see which you _really_ love? Keep one as a spare so you'll always have one when the other is in the shop, and so you can take non-biking friends out for rides?

I can see how it could be a problem if storage is an issue. We have four bikes (and three are mine!) and hang them by their wheels from ceiling hooks, fairly close together. They take up a lot less room than standing on the floor.

Nanci