Hateraid is def right. There aren't any similarities between Deron Williams and Mudiay. Williams is (well he was) a PG Mudiay is a new school PG more of a combo guard. I don't see a ton of Wall in him but I see a little. I think that Wall has more PG skills and Mudiay seems to be a better scorer but then again he's playing in China.
While I'm not in love with Okafor, I don't see him as Curry really though because although he may not be an excellent face up shooter, he definitely already has an array of moves that Curry didn't have at this age. It took a while for Curry to grow into a decent scorer. Okafor is far ahead of him. That being said, Okafor isn't athletic and isn't a great rebounder but as far as bigs with really sound moves, I can't think of one recently that was as well rounded as he is at this age. But being big and having moves can get you pretty far. Duncan was never lightning fast but his offensive skills are about as good as you can get. He of course is a much better rebounder and defender than Okafor but he's not super athletic and never has been.
I love Johnson but I don't think that the Sixers would take him with a top pick. If that's who they wanted they would take him and then concoct some insane trade and hold whoever wanted Okafor hostage while they got Johnson. This is Hinkie we're talking about not David Kahn thankfully.