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