Minecraft wiki entry for Parity_issue_list, associated text: Attempt to stay 16 blocks away from ocelots, similar to cats.[feedback 32]
Can drown.[117]
Have different attack strengths: 4 on Easy difficulty, 6 on Normal and 9 on Hard.
As of Java Edition 1.14, phantoms deal much less damage: 2 on Easy and Normal and 3 on Hard.[118]