I traded in a perfectly good RT after 4,000 miles & 4 month for a GS/A. It is, in every way, superior to the RT.
6'2", 34" inseam, I've got the windshield 1 notch below it's uppermost position with a TT spoiler on it and the wind protection is fantastic. No, it doesn't have the silent bubble the RT had with the Ztechnic windshield, but that's fine with me. Wife had no issue riding nearly 6,000 miles in 11 days on the back of the bike last June.
And dynamically the Adventure can wipe the floor with the RT.