As for Sullinger, he is undoubtedly the better passer, and his knack for rebounding certainly trumps Al's, but he doesn't play near the basket enough for us to have enough data to do a fair comparison.
Before he messed up his knee, Jeffersion was a 20-22 ppg and 10-12 rpg type of guy in Minnesota. That was in his first two seasons with the team, when he was just 23 and 24, respectively. He was at least as good a rebounder as Sullinger, an automatic offensive player, immensely more athletic, and didn't come that much extra pounds or a bad back.
Sure, he's also a walking example of how one injury can change everything, but that's a different discussion altogether.
Yeah, Al was almost unstoppable offensively, but I don't think he had the gift for rebounding that Sullinger does, which is even more impressive when you consider the difference in athleticism, which in my opinion, isn't as great as what you're suggesting, but maybe I'm not remembering something correctly. It wasn't like Al was on the level of Josh Smith in terms of athleticism, but yes, he was pretty good in that department. Was Al a better prospect in 06-07 than Sully is today? Uh, yeah, but we'll see what happens down the road - assuming, of course, that Sullinger is still on the team.
It's not that Jefferson was a Josh Smith -- but Sullinger is spectacularly bad. He can barely elevate, and looks like he's stuck in molasses when he has to move from side to side. Perhaps I'm overstating the difference a bit, but to me it isn't close.
You're right that we'll see what happens down the road -- but I'm not overly optimistic for an overweight big man with documented back issues -- no matter how talented. I'd rather cash my chips while I can.
If Sully's weight is going to be a big-babyish problem for him during his career, then we're obviously going to have a problem. True, I'd rather have a guy without any back/weight issues, but the surgery was a success and he's reportedly working on his body, so that could improve his athleticism, but you never know. I think the point here is that we aren't going to get a lot for a trade that features Sullinger as the prize, with or without draft picks, unlike the deal for KG that was centered around Jefferson, but we'll see. Personally, I don't like throwing away draft picks because that always seems to come back to haunt us down the road, but, on the other hand, I don't trust that Ainge will get the best players, which is why he tried to acquire as many selections as possible. It's his dirty little secret that as long as he has an abundance of picks, he won't strike out on all of them, but I think it's pretty obvious that he'd rather trade those picks to a team that actually knows how to scout, select, and develop talent for a known commodity than have to do that himself. I just don't think he's nearly as good at drafting players as most people think he is, but again, that's just my opinion.