well, this is what we noticed (haven't picked up the 2015 yet, but looked at it this weekend)
Different style drawer/cabinet pulls
NO CARPET anywhere, including up front (wood pattern vinyl)
LED lights under awning (this may have been standard, but wasn't on the one we looked at)
LED lights inside (all overheads)
The living room TV does NOT slide, I specifically looked yesterday.
Wish it came with the "drivability pack" but I think that's aftermarket only.
If there are any more specific questions, I'll be happy to try and answer them from memory , or once we have picked it up on Thursday, will be happy to look.