I wouldn't go as far as saying you can ignore numbers completely but I think what the numbers show is that so far, Sullinger and Noel are fairly equal players.
Seriously, who cares? What you'll have to actually watch them play to analyze is that their games have zero in common. They really have nothing to do with each other as players.
Meanwhile, if you believe like I do (for better or for worse) that Celtics management loves Olynyk and will exhaust every opportunity to turn him into an All-Star caliber player, then you better ask yourself who's a better fit to play along side him.
At the end of the day, what amuses me is the comparison between Noel and Sully, when Sully is the sweetener in the deal, not the drink (that's Smart). Sully's trade value is pretty minimal.