I see people saying the 15 is better. To me, it is different. First, I got this one at a similar price I could have bought a bottle of 15 so there's no question about the 17 being more expensive than a 15 and not being as good.
This one is probably not as round and sweet as the 15, slightly less rich as well probably but it has something I really like that the 15 doesn't have : the smoke finish.
Nose: butterscotch, cherry pie and traces of roses
Palate : Sherry, light caramel and oak... Stays on a very oaky taste before the...
Finish : oak stays, brings on the smoke and hints of spice and sweet fruits (some would tell you sweet cherry, still, but somehow I get some apple... Spice and apple.... Apple pie...)