Suggestions for new XT8 motor

[jasje]

As some of you know, my neu 1515 2Y 1100kv Heli version motor broke, and I'm ordering a new one. I'm running 6s lipo, so I was considering the 1500kv 1.5Y version to get a bit more rpms. Is there a big difference between the 1.5Y and the 2.5D (1650kv) ? Not talking about the kv, but the Y vs D thing.

I bash 99% of the time

Thanks for the feedback!