I've been thinking about speed running RE6 however the only difficulty categories are Amateur and No Hope. I was looking to run Normal for my first run (I know I wanted a challenge more of a difficulty challenge) and to maybe go to Veteran & Professional at some point. Unless I'm blind, (which is entirely possible) I don't see any other difficulties.

{Also I wanted to know on PC, if visual mods are allowed? E.X. Normal costume skin mods and weapons skin mods. Nothing NSFW of course.}

Correct, there are only Amateur and No Hope difficulties as categories. This is probably due to the fact that there's so many other difficulties that a lot of them kinda just merge into one difficulty per say. I would suggest running Amateur.

Also on PC no visual mods are allowed :)

Oh ok, thank you for clarifying.

The other difficulties actually used to be there and no one ever did them, just Amateur and No Hope so they were removed.

Also, basically as Salad said, in a speedrunning sense, there's not much difference between some of the difficulties aside from needing to shoot things a few more times.

^ Was just gonna mention that lol

Oh interesting, never knew the other difficulties were in at one point

Yea, this was quite a while ago. Soulless would have to say when since it was before I ran the game.