I had the opportunity and purchased-back my old 00-LTC, after discovering that my wife could not tolerate the GT for extended periods, due to her old back/neck injuries received from a car accident.
and...after riding the GT from Dallas to VA last year, I must admit that, even though i could work around the issues (seat issues/leg position/forward lean-even with barbacks), I was not in the best of shape after extended runs, over 300miles or so..
My wife also reports that wind protection on the LT is much better for her. and, as I also concur that the heated seats do a much better job on the LT, due to the larger seat area in-contact with your rear-end.. Which also means broader base of support. Some of us old folks just need the extra comfort, especially when the passenger can make or break your day !
So physically speaking, for both of us, the LT is by far the best for us. we have been out several times on the LT after getting it back and do not hesitate at all to go anywhere. she has only ask for armrests, to help support her back issue, but even without them, she says the experience is now much, much better and she can tolerate an all-day ride now, whereas on the GT, she was looking forward to gas stops, sooner than later...
so that is why my Graphite 07-GT is 'For Sale', with only 6K on the ODO.