It is not right answer as given by ranveer.

Entity beans now become JPA so it has all the feature which hibernate has.
All the application server has to provide implementation of jpa using presistent provider  like hibernate ,toplink.

Entity beans are heavy objects and carefully needs to be choose. on other hand hibernate can be good choice for small to mid size projects.

Entity beans come with container advatanges and this feature make it slow too.
Hibernate, we need to manage the transaction,security,etc.