Moe handled the ball like a guard. He rebounded like a center. Sampson, for as much as I love him, makes me close my eyes whenever he dribbles more than 2-3 times. It's a mistake waiting to happen. He also doesn't rebound like Moe, but the difference there is much closer.
Sampson has not shown an ability to hit a three pointer, handle the ball on the perimeter, or defend a guard/forward. Moe did all of those things (albeit the 3 pt shooting not at the greatest rate).