It literally does not matter. Everyone keeps throwing this out in defense of Oloffson but he was a defensive sieve. His 28 goals were offset by -23 goals alone at even strength. So if Rousek can be a +/- 0 and score 5 goals, he is as useful as Olofsson.
Olofsson can't play defense. Rousek can, I will take Rousek and his less of a shot over Olofsson's shot and almost nothing else.