Monkeys and apes are both primates, but there are several key differences between the two groups.

One of the main differences is that apes do not have tails, while monkeys do.

Apes also have more complex social structures and communication systems than monkeys.

Additionally, apes tend to have larger brains and are generally more intelligent than monkeys.

Another difference is the way they move. Monkeys are more arboreal, meaning they spend more time in trees, and are adapted for this with their longer tails and more flexible spines.

Apes, on the other hand, are more terrestrial, meaning they spend more time on the ground and have adapted to this with their larger, more powerful bodies and shorter tails.

Monkeys are found in both the Old and New World, while apes are only found in the Old World.