I have been in the oposite position, where I came from Eclipse background, and had to use IntelliJ. Lets just say that I wasn't a happy camper for a while.

IntelliJ might be a tad better usability wise, but Eclipse has so many extensions, tools and more as it is the default IDE for a lot of projects/ecosystems.

I think it is a matter of preference, and what you are used to.