Minecraft wiki entry for Panda, associated text: Playful pandas:
Roll over and jump around even as adults. The ability to roll may sometimes cause harm or kill the panda as it can accidentally roll off a cliff or another high altitude.
Aggressive pandas:
When hit, an aggressive panda attacks the player and other mobs continuously until the target dies or goes beyond detection range, instead of only once. It also doesn't panic when harmed.
When nearby pandas are attacked, unless killed in one hit‌[JE only], aggressive pandas becomes hostile toward the attacker.
Are slow, but have reach rivaling that of the player.
Weak pandas:
Tend to sneeze more often as babies than regular baby pandas, and have half the health of other pandas.
Brown pandas:
Do not have unique personality actions, but are brown and white instead of the usual black and white.