Hi All,
I am looking at a new bike and my sizing on the Canyon Ultimates is between L and XL. I'm 191cm, and notice that my shorter friends can beat my PR's even when putting out lower watts than me but similar weight, so I guess Aero is champion.

Not going to go completely AEROAD, but I'm between two sizes given I also have a long back.

Question is...
is it better to err on the side of the smaller bike (as my old Ultimate).. .given it is smaller and hunches me in to a tighter and nippier profile?
Or better to go for the larger bike given it may have a longer seat-to-stem/bars distance and be possibly more comfortable or else let my back stretch lower?

Thanks!

Gavin