From what you stated, I'm thinking the r3gt is a better fit. Had you said I will do 75% time touring, it would be the GW.
Your comments after sitting on one at dealer was spot on! Riding it over time will increase enjoyment.
One cannot overstate the difference in handling a 900lb bike vs 650lbs, in both moving backwards, out of parking lots, slow turns, and twisties.
Good luck and let us know what you decide.