Mike maybe I'm equivocating, but I see the RT's as being a bit more 'touring' than sport, when compared to the R's. 'Cause of the farings and all.
I did a 2500 miler up and down the east coast on the R, summer 2018. When I reached that highest elevation on the Blue Ridge Parkway (6K ft), I was wet and COLD, especially hands. Wasn't expecting that.
Not saying that the RT would have been a decidedly better choice, but if the R is the way to go, I plan to get better wet gear, gloves and handguards!
Any other advice is appreciated.