My wife rode pillion with me only once on my R when I had just got it. She said 'never again,' but she is no spring chicken either. Those sexy passenger footpegs fold out 'widish' and are really small. And the biscuit passenger seat is narrow and hard - I cannot imagine myself being comfortable on it for long. That fitted on the GT is a bit better, I think. If you choose the R, wishing your wife to ride with you, you will need to get the optional backrest. And the R just does not completely look 'right' with it, IMHO, that is. Without a backrest, she will have to hang on to you all the time, which is unrealistic, unless you are both youngsters.
Also, consider a proper aftermarket seat with adequate passenger butt support - whether you get the R or the GT. Happy wife, happy life. The stock seat is OK if you ride alone and really well-made for a stock seat.
We ride together on an 1190 Adventure, GL1800 and Chief Vintage - all stock seats - but I installed a Mustang® seat on the Cross Country and a LePera® on the H-D Breakout. Backrests on all of them. I have a Rottweiler® Intake, RapidBike® fueler, Arrow® exhaust and Yoshimura® 'silencer' on the 1190, so it motors along when I twist its ear. Meaning that the wife is well used to speeding along, as long it happens comfortably (-: