Why are they not comparably in terms of playmaking?
I see Getzlaf because of his combination of playmaking, scoring, defensive awareness and physicality as a center who put up pretty good point totals without being recognized as a purely offensive player.
Getzlaf is/was a bit bigger than Stutzle for sure, but I see Timmy becoming an excellent two-way center who will still put up great offensive numbers but maybe never top of the league numbers. He is a better passer than he is a shooter and with a bit more physical maturing he will be dominant with puck on his stick and will be tough to knock off, just like Getzlaf.
Anyway, maybe I am seeing Getzlaf today, and it could change tomorrow but I do not think it is that bad of a comparison to be honest.