I have now ridden a well set up 2015 and my well set up 2016 LTD both on same day, same snow. The 2015 is a good sled to start with. The 2016 LTD is a very good sled to start with. The clutching is smoother (although I do have MDS weights/spring), it gets up on the snow much better, even with similar settings on the rear skid (front track shock @ 1/8" thread pressure positive). It handles much better in the the technical riding, which a lot of that can be attributed to the much better clutching.
I was able to get a smoking deal on my 2016 LTD, I added up all the mods needed to make a 2015 the same as a 2016 (clutches, skis, 36" front end, 3" track, was gonna do Raptors but the EVOL are very good too) it was close to a wash. It actually all came down to the financing rate. I got my 16' for $500 cheaper than what I could get a 15' with all said mods, financing was cheaper, got an extra year warranty, a free belt, and free cover with the 16'