I'm looking at upgrading my current road bike (a Scott CR1), and the new bike I'm looking at has about 1.3cm more drop from saddle to bar. The reach will be comparable (within 5mm or less). The seat tube angle on the new bike is 73.5 whereas the old was 73.3, so if I draw a line directly from the top of saddle to the centerline of the handlebars the new bike has a distance which is about 5mm shorter than the old one. All this to say, the only thing that seems significant to me is the 1.3cm diff in stack. I'm trying to order direct so I can't try before I pay. Any thoughts on if this extra 1.3cm is going to feel earthshakingly different? I'm assuming it goes to my flexibility and how much I can flatten my back? Thanks!