Well, I just bought a road bike. I did all my homework on geometry and the 56cm Cube the shop built for me was too small. The 58cm fitted like a glove, but was carbon and Ā£750 more but the same components (105). I went to shop no. 2, took my existing bike and they the set up the various ones I was interested in the same. Two Giant models in M/L felt radically different. I chose the one that fitted the bestā¦
I learnt a lesson here, on paper and in reality are very different!