This would be a great fight for the first 5-10 minutes then Nova would be worn out and lose. Silver Surfer wins this because he has more durability and wont wear out as quick.
I don't think Surfer got an "upgrade" in the sense as there being a name for it. He basically was remade to herald level, and removed his "conscience" that stopped him from going all out.
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
I'd give it to the Surfer. Nova would definitely be able to hang for a while, but I think he'd have a hard time overcoming/dealing with the Surfer's durability and speed.
For a minute I thought it would be the Supernova from "52..."
Don't know enough about this Nova to make a fair decision.
__________________
Humans are afraid of the dark.
And yet… At the same time, we’re fascinated and bewitched by it.
Maybe that’s why humans drink the darkness that is coffee.
Nova's main disadvantage is his human physiology. His body can't take as much stress as SS can. He'll wear himself out if he has to keep him self at maximum output constantly.