The better chef?
I think it's a bit stupid to compare two different running backs that run behind two different O-Lines.
Cook has the speed and is FINALLY showing a bit (only a little) of power in his game. For the first few games, he would get drop to the ground at the slightest effort from the defensing player.
Motor had exceptional vision (When there actually were gaps/lanes) and almost always gave the defending players a big "Pop!" at the end of each run. For such a small guy, he packed a punch, and I loved watching him play.