NEW Shafts for the 2016 850 SP ???

I was under the impression the 15-16s 850 were the same,but now I’m seeing this listed for the 16’s

Quote:

NEW! 50% Stronger front half shafts and 10% stronger front drive for increased durability


Quote:

NEW! High flow, high capacity air filter with better dust filtration to protect your engine


Did the 15’s also have it