i am picking up my '14 XL 350TS this morning in TX. typing this on the plane as i travel (gotta love gogo inflight). my dealer has two '15's on the lot that i looked at. they are '15 coaches on '14 chassis, and are the "black diamond" edition XL 350TS's. i would not consider them as i don't like the interior, but the dealer has '15's on the lot with more coming in the coming weeks. there are some differences between the '14's and '15's in the XL line, but not much (all cosmetic, as best i can tell). there are bigger differences between early build '14's and later build 14's, so check the date of production on the unit you are looking at. for instance, the extra battery compartment by the entrance on an XL 350 TS and the ability to add the front drop down bunk after the fact if not included as a factory option, for just two starters.
i would not buy one without seeing it and driving it, hence my flight 2 weeks ago to TX to the dealer to do said actions and haggle price. now 2 weeks later i fly back down to get it and drive her home to CT as a 1800 mile shakedown run. it was great being able to look at and drive 4 different models of coachmen and georgetown coaches and literally line them up side by each and compare and contrast them. i can't imagine making a 100k buying decision without doing it, so i highly recommend you do it at a dealer(s) that have the ability to accomplish this for you.
just my .02 cents....
2014 Georgetown XL 350TS
2014 Jeep Wrangler Rubicon Unlimited
Front & Rear Roadmaster Sway Bars
Front and Rear Sumo Springs Jounce Replacement