system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What the differences between Power Cosmic and Cosmic Energy?

Are there any difference between the two other than the name? Does people with Cosmic energy such as the Eternal, Fantastic 4, etc use the same power as the Herald of Galactus?
gpt
Totally, totally, different. 

Cosmic rays are a real thing, being loosely the background radiation of the universe. Marvel just wrote in that some characters harness (Eternals) or were altered (F4) by it.

Galactus’ Power Cosmic is a completely invented well of power in the sense of the ability to actually do things like travel through space, blow up planets and manipulate matter & energy.