Is Creo the same as Pro E?

Excuse me, could you please clarify for me if Creo and Pro E are in fact the same software? I've heard some people use the terms interchangeably, but I'm not entirely sure if they're referring to the same program. I understand that both are used in the field of design and engineering, but I'm wondering if there are any key differences or if they're simply different names for the same tool. Could you provide some insight into this matter? Thank you.