Faring's are different, sub frame different, different instrument panel, different front brakes, slightly different swingarm, radiator overflow tank is in a different location, no helmet lock(S1).
Might have missed something but a fair amount of parts do swap...
You can always look up parts for each bike and compare part #'s for smaller things (or larger). Also helps figuring out assembly, etc:
https://www.partzilla.com/catalog/yamaha/motorcycle