I'm looking at these two bikes to possibly purchase. I've ridden the Defy 1 but not the TCR SLR because the local bike shop doesn't carry it. Looking at the specs, it looks like these bikes are very similar as they both have the 105 group set. The TCR has narrower tires I noticed, but other than that, is there much of a difference for comfort? I assume that the TCR is lighter too. Thanks for your advice.