I don't know what it is; technically, my pure sharp has way better quickness/speed stats than my sharpshooting slasher, but it sure doesn't feel that way. Maybe it's a mindset thing (I'm assuming height/weight determines a lot too).
Like I said, I based my sharpshooting slash on Blake Griffin (which seems like the ideal player to base a park build on); I honestly think it's all mindset -- how you use your player and playing your role. Every build should be viable. I could still playmake as a rebounding defender because I keep my head up and am always looking past the guy defending me... so many players can't do that; they only try to blow by their guy, and only pass it when they have to/feel like they've ballhogged for too long (obviously your build should contribute to your strengths though).
I mean, is there really a "best build"? Sharpshooting slasher was in Agent 00's top 5 worst builds at launch but at the midway point he was touting it as the best... I know Curry rules the NBA, and when you're playing 3v3 on the park the matchup to watch out for is a pure sharp, but even as that archetype I noticed my rebounding defender could move around the court so much more freely; like there truly was a difference, which pleased me.
But there are obviously comp pure sharps that have their release down to a tee that it isn't even fun, so what do I know?
This is inevitable brah, and they could and probably are changing the system again; the one thing I have always regretted is deleting builds out of frustration/the desire to focus on one... I
never learn.