Sure, I didn't mean there should be more categories... just that there are more differences than just whether the maps show up.

Ah, I tried it again and yes, the door does disappear for a while whenever you hang over the floor "ledge" below it. For me it's nowhere near long enough to get back up there, though.

How certain are you that corner warping no longer works on PC?

I don't recall the exact circumstances, but at one point after picking up the scuba mask I was messing around in that room and got teleported to the room where Claire is almost tortured in a cutscene. It may have been related to climbing over the shelving but I think I was actually swimming around in the water below, to the left rather than to the right where the passkey is.

It seems a very similar effect to the corner warping, so I'm wondering how "fixed" it really is. Also whether this warp to the Claire room is useful in 100% runs :)

The leaderboard suggests that casual and normal are basically the same except Normal skips some cutscenes, but I don't think it's true. I tried a speedrun on Normal and noticed that I often had less than full health, and I consistently died during the final boss battle, about half-way through it.

It wasn't bad up to that point though, so perhaps it's worth starting in Normal and switching to Casual just for the final boss battle, which you can do through the menu.

Greenalink, I couldn't get that door to slow-load on PC unfortunately. But I don't know much about that technique, I just copied the kind of thing you did in your AGDQ video. I'm not so worried about the time it takes to kill that boss, at least in casual mode, but having triple jump a bit earlier would make a lot of other things more efficient.

I think my loading times are worse when recording video, which obviously doesn't help. Sometimes the whole thing grinds to a halt with 100% disk activity. I'd like to record a 100% run but it'll have to wait until I can record to a separate disk.

Loading times on PC are rather variable. In your NG+ Any% video the initial load after the intro takes 6 seconds, but in a recording I just did it took 19 seconds. Overall your defecit between in-game time and real world time is 1:52; mine is about 2:20, following the same route. It might mean that real world time isn't a great choice. However it also makes me wonder whether even the in-game time is affected by the times when the game pauses to load things, without a loading screen.