I made a spreadsheet documenting the stamina cost / roll count for levels 100-Ex Lvl for Gambit 2, so I'm not going off of memory with that. I didn't track it this time, because I assumed it would be the exact same. However, I noticed that with a number of the levels in Gambit 3 I was doing 1 extra roll to get to the Choice of Fate... but by the time I noticed I was already around stage 150ish and didn't feel like it was significant enough of a change to document specifics again. However, I can assure you, Ex Lvl in Gambit 2 was exactly as I documented in my original post.

I noticed that only at 2nd phase (Stages 101-120)