If I may...
Daffy was a big cartoon star before Bugs came in. Daffy's character turned into a jerk at that time, but that's clearly explainable that he got bitter and angry due to his displacement. Now Daffy's paranoid, crazy, stupid, and angry. And he's been that way since Duck Dodgers. I'm really liking the angle of being nuts and not too bright.
Now, contrast that with Porky. He was the big star BEFORE even Daffy... and now he's sort of a sidekick/dormat type character. Reading too much into it, Porky handled being pushed out of the spotlight pretty well. As Robin said once in that CN indent, Porky's best work was when he was a sidekick/foil.
Porky is such a mensch.