X came to life in 1973, Y in 1989.
Y wears sunglasses.
Y has larger ears than X and is apparently a different shade of pink.
X seems more anthropomorphic than Y.
X is a whole species of animals while Y is the only one of its kind.
X does not live in North America.
Y can be seen playing a drum while X can be seen doing …. a lot of things.
What are X and Y?