Whatever emulator narrowtomato used for their current WR is much less laggy than the others in submitted runs. Testing against bizhawk (myself) and retroarch/beetle (spudhimself's current run), levels like hate tank and collide are much slower than in whatever narrowtomato used.

Haven't had the chance to test on real hardware, if anyone knows whether those levels lag severely there too.

Why is the care package allowed in the base game but not with DLC?

yeah pc version has no loading and some bits (schneobelen especially) have way less slowdown; i beat my old record by like 10 minutes but it wasn't even a pb, the pc version is just that much faster