superman's strength feats on average are prob more impressive than Surfersalso, Superman regularly speedblitzes his enemies, I've almost never seen Surfer ever blitz an opponent
The Surfer didn't even need to try against an enraged Hulk, and the Hulk once destroyed a cosmic body twice the size of the Earth. Has post crisis Supes ever destroyed an Earth sized or larger planet?(note this isn't sarcasm, I don't actually know if he has or not)
Also, feats are kind of a moot point when Marvel has said Surfer can enhance his strength to infinite levels with the PC. Since Marvel made the character, what they say goes.