If you are the opposing team and Sully (PF) is alongside KG (C), wouldn't you just put your center on Sullinger and move your PF onto Garnett?
At least most of the time ... since PFs generally defend KG better than Cs and Cs will defend Sullinger better than most PFs.
That's somewhat true. But couldn't the same be said about Bass and KG? It's not like Bass is taking slower centers off the dribble, despite the fact that he's quicker than Sullinger. And Sullinger does have comparable (and perhaps even deeper) ranger to Bass.
That said, going back to what the OP said, I think there's something to be said both for and against Sullinger over Bass.
In terms of a pro Sully perspective, when the team first drafted him, I thought it might spell the end for Bass. Like Bass, Sully can hit jumpers, and unlike Bass he has a post game and rebounds.
On the negative side, if the team really saw Sully as a guy who was going to immediately snatch the job from Bass, why did they give Bass the deal they did, particularly on a team where Jeff Green is going to get some 4 minutes too?
I think that the contract may keep Bass ahead of Sullinger in the short term. And not just because of what it's worth, but because of what could happen to Bass's trade value if his minutes dramatically drop.
A team might be interested in taking Bass off of our hands if he's having a year like last year. They're not going to take him off our hands if he's putting up a lot less than that in 10 mpg, if he's buried on the bench behind Sully and Green.
So unless Sully hands down beats out Bass, I don't see Doc going with him. It's going to take more than Sully just narrowly beating him out.