Any difference (other than cosmetic) between the Chevy Suburban and the Yukon XL? I'm looking for a Tahoe/Yukon but I wouldn't be opposed to one of the land yachts. Not sure what to look for in a Yukon XL. I'd like whatever the top of the line trim is (except the Denali...not really my thing and it doesn't look like I could get shiftable 4 wheel drive).