we have 1 good trick on stage 4 in version REV00

REV01 makes it way easier to fight Mr. Big in Stage 6.

I found out a couple years back that REV01 is faster due to the last boss fight. I think REV00 is faster for TAS if I'm not mistaken.

True. TAS doesn't care about hindurances in Stage 6 and can abuse all that REV00 can offer :)

If someone eventually finds a consistent strat to beat Mr. Big quickly, then REV00 would likely be faster.