Jennifer Lopez

People tend to think twins are one in the same, but Jennifer Lopez says hers are "very different" from each other — and not just in terms of looks.

During a guest appearance on the Rachael Ray Show on Friday, Jennifer Lopez explained how her twins, 14-month-old Emme and Max, have two distinct personalities.

"They're very different. You can really see it, even from when they're really young," Lopez said.

The 39-year-old mother described her son as the type who is always "running, knocking things down [and] eating the world." Her daughter, on the other hand, is more "indecisive" about her actions, but, at the same time, "very precise."

Lopez says she and husband Marc Anthony sometimes disagree about who contributed what features to their babies' faces.

"You know what's so funny though? Me and Mark are always claiming he's got my head and he's got my mouth," said Lopez. "That's the nature of who we are. We can't help it. We're both trying to steal it all!"