I know the XL also has bigger storage doors and 22.5" wheels, plus other minor details. we have been looking at the Georgetowns and that is the brand we are considering! with the bunks and residential fridge. I would like the XL, but the price difference for weekend trips and a couple of 1-2 week long trips isn`t enough to justify it. now if we were going to travel more than that....then the XL would be the way to go!
I`ll have to pull the brochure out and check on the roof material. I think both Georgetowns have fiberglass roofs.