Hmmm lets do the tale of the tape
Barney: yep he is a dinosaur, but he is purple and kind of a sissy in a real nelly kind of way.His weapon is being annoying.
Big Bird: He has that pick pecker beak. But he spends way too much time smoking bud. Like C'mon he is the only one in the neighborhood who sees a big hairy elephant called Mr Snuffleupakiss.
My bet is on the Dinosaur and he will just annoy Big Bird to death and make him smoke more kronic and sleep and see imaginary friends.
Although if Big Bird got a major case of the munchies he might eat the purple dino.