Before you make your mind up you should watch videos and read the DX profiles.
OKAFOR:
"he turned in one of the most efficient, prolific post up scoring seasons of any elite NBA prospect in recent memory, outscoring a number of teams from the low block on the year by himself, shooting .922 points per possession over 8.4 possessions per game. "back in college.
2 of the more concise videos of Okafor:
https://www.youtube.com/watch?v=ZihwmQ3PaC8
https://www.youtube.com/watch?v=pb1iND8bFLU
DX profiles:
http://www.draftexpress.com/profile/Jahlil-Okafor-6469/
http://www.draftexpress.com/profile/Nerlens-Noel-6455/
By far Okafor. The dude is longer than Noel and way bigger but without being fat. He has some of the best footwork and has very nimble feet and a very quick first step.
I am happy that many people believe Noel is better for us than Okafor and that even scouts believe this, because it shows how low his stock is and also shows a bias/misunderstanding of the current NBA style/market. And bc his value is so low the Celtics will actually have the ability to acquire him.lol.
1) I don't have to watch any videos or scouting reports - I know both players.
2) You say Okafor is "longer then okafor and way bigger without being fat". That it absolutely wrong. I disagree. Both guys have comparable height (at 6'11) and length (7'4" and 7'5") and Okafor absolutely IS fat. He's not Sully-grade fat, but he's chunky.
Having seen him play, he just doesn't look the slightest bit impressive. His post game is good and he has a lot of potential in that regard, but it's not like he's the best post scorer int he NBA. Watching him play down low he looks really no more impressive then an Al Jefferson, Greg Monroe or Demarcus Cousins.
Which is fine if he was good at other things, but he's not.
So given the choice, I would take Noel as a preference. He's a better rebounder, a better defender, a playmaker (disturbingly) and is just more versatile in a number of ways.
If Noel even developed a solid offensive game, he could be a star.
For Okafor to become a star he'd need to dramatically improve his defence, his rebounding, his conditioning AND his overall offensive game.
I have more faith in Noel developing one area or his game then I do in Okafor developing ALL of his game. Hence I'd take Noel, without a doubt.
However if I couldn't get Noel, I would be ok with Okafor as a second choice.