Funny thing is Jurgens did say that Doomsday in HP was only as powerful as Superman but won due to Superman holding back.
DAN JURGENS: Yes. Right.
RC: Now, regarding Superman in Hunter/Prey , how do you account for Superman�s abysmal performance against Doomsday?
DAN JURGENS: I always said that when it came down to a knock-down, drag-out, kick-ass fight, that Superman was always limited by his
upbringing . In other words, if you take Superman and his upbringing, his moral code-the "governors" that put him in place to make him the decent human being that he is-and you take someone else who is raised, let�s say on Apokolips, and they are one nasty, mean-ass sonuva . . . even if they only have 95 percent of Superman�s power, they have the advantage in a drag-out fight to the death.
How many Superman stories did we read where he would be in a battle and it was presumed that he was going to die or lose or whatever, but somehow he outwits the opponent? It was never necessarily that he went absolutely nuts and beat him; and I think that�s what Superman needs in those moments.
RC: With that in mind, the question is begged . . . if Superman didn�t have to worry about other people and if he had cut loose in his first fight against Doomsday, would Superman have done better?
DAN JURGENS: Yeah.
RC: Which raises another question . . . were Superman and Doomsday roughly equivalent in terms of power in Hunter/Prey ?
DAN JURGENS: Yeah. Yeah.
http://comicboards.com/jurgens-rc.php
There you go JBL. No imaginary writer necessary.