* Kangaroos have strong, sharp claws on their feet. They use these claws for digging, scratching, and for defense. However, their claws are not typically considered "long" in the way that, say, a cat's claws might be.
* Koalas have long, sharp claws on their hands and feet. These claws are essential for helping them grip onto eucalyptus branches, as they spend most of their time climbing and sleeping in the trees. Their claws are considered quite long, especially compared to their size.
So, to answer your question:
* Kangaroos have strong claws, but not necessarily long ones.
* Koalas have long, sharp claws, crucial for their arboreal lifestyle.