Thor vs Silver Surfer fights all have context. And obviously context matters. I mean if you look at the even somewhat relevant fights between the two(and other thor like characters, they still have context)
Mighty Thor 3-5: Surfer and Thor are shown on a fairly equal standing. Context: Surfer was holding back quite a bit while Thor was going all out, Thor was wounded, but his pain tolerance is insane so that shouldn't have been a problem, Thor had special Asgardian armor very similar to the one he had in Fear Itself that amped his durability
Beta Ray Bill: Godhunter 2: Bill gets stomped in H2H by Surfer, something Bill specializes in compared to Surfer. Context: Bill isn't Thor, but they're pretty close to equal in power
Thanos imperative 4: Surfer blitzes and two shots Canver-verse Thor. Context: Not technically Thor, but in Realm of Kings 1 Cancer-verse Quasar was said to be equal to 616 Quasar
Avengers Annual 11: Surfer(Stated to be holding back in the same comic) says he could've one-shot Thor and Thor agrees. Context: It's just a statement
The rest are so weighed down by context they honestly aren't worth mentioning