No - the groupsets will be very similar, just a few subtle changes, depending on which one you get. For example, you can get a Shimano 105 Triple groupset for pretty much the same price as a double, or compact double. Just pays to investigate a bit before splashing the cash. Different people will tell you different things about which variations they like or not. It's quite a personal thing. Could you perhaps test ride a few bikes and see which you get on with? If I was starting cycling and lived in a hilly area, I think I may well end up cursing the purchase of a standard double, but that's just me...