Creepers prioritize attacking players over avoiding cats and ocelots
Creepers ignore cats and ocelots when they see a player in survival mode. Creepers avoid cats and ocelots only when there is no targeted player.
In 1.8.9, creepers sometimes don't notice cats and ocelots, but they do avoid them.
UPDATE: Since 15w45a & 15w46a, creepers have the same behavior as in 1.8.9.