In order for Stiemer to fill the Perk void he needs to rebound like Perk did, I think he is a better shot blocker, certainly a better shooter and probably a better finisher inside. Perkins however is much better on ball defender against the elite centers like Dwight and Bynum.
The numbers say they're equal at the rim with Perkins haveing a better overall percentage on "inside" shots.
The question is how many of Perkin's turnovers are when he has an easy dunk and fumbles it compared to Stiemsma's. Neither is all that great at the rim for a big man anyways.
Yeah without looking at the numbers I remember perk as putting up a lot more shots inside (probably because KG went inside more which brought the big covering Perk to help, as well as playing more). However, I don't remember Stiemer fumbling as many.
Another thing that has to be noticed is Perkins developed a reputation as a good defender that lead to the officials often giving him the benefit of the doubt. Stiemsma gets no such treatment.
Stiemboat will never get the Perkins scowl down no matter how much he tries.