Thanks for pointing out this interesting character Wiggs, I'm a fan of alternate universe variants of characters in general so I'm looking forward to reading about this super version of Supes. He is also know as "Superboy Prime."
No, that is a different character.
Superboy Prime is a character that came from the alternate Earth Prime, was superhero for a while and then turned super villain. He was referred as Superman Prime for a little while due to some copyright issues I think and also when he wore a black suit and aged physically from absorbing the Guardians power.
The Superman Prime Wiggs is talking about here is a character from the DC 1 Million series, the golden Superman in the pic posted a few posts back. I think he is basically the silver age Superman that spent 300,000 years in the sun or something like that and came out to destroy a star during the ending of the 1 million comics.
And yes I'm a comic book geek.