Good reference Machka. Just shows the relative complexity of a single bike fit parameter...seat height. And OP of course seat height is only the tip of the iceberg. Seat setback and even tilt matter a lot. Suffice to say that bike fit is an enigma wrapped in a conundrum. After four decades of riding road bikes of every shape and variety, I have mine pretty much dialed but have spent countless hours tinkering with it for the simple reason that when I ride 4 hours hard like I did yesterday...it is simply worth it.

I was out riding with my riding buddy yesterday on a perfect day. My buddy and I when not just chatting and riding side by side take turns pulling for one another...sometimes aggressively. We are riding out to our favorite park and come upon a kid who I would say is averaging 20 mph on a BMC with aerobars. We all stopped together at the light and began to talk a bit. This kid was one of the most perfect physical specimens I have seen and he rode along nicely. He was out for a hundred mile ride and was training for an ironman as it turns out. Ah to be 22 years old and ripped. So we rode along for a while with the kid and then my buddy and me dropped him. I am almost 3x's his age. He was a very nice kid tho.
Dialing your fit if you do big miles is particularly important for injury prevention OP and worth it for both comfort and speed.