UIUC Which is the least competitive? LAS Maths, Phy, or Stat?

I’m surprised to learn that UIUC/LAS admits by major.
Maybe more liberal arts programs do this than I thought.
So are there differences in specific entrance requirements for different departments?
I would think differences for math v. stat v. physics admission rates (or average scores) would depend on the current year’s applicant pool and their preferences.