He doesn't really compare to any of the three. Better man-to-man defender than DeAndre, better defender but not as offensively polished as Hibbert, longer and more athletic than Perk (although he'll probably end up doing a lot of the same things).
We'll see. He has some issues, but he does have a lot of upside. I don't hate the pick, but I do wish we'd just taken the flyer on Perry Jones III instead.