Yes-- there is no significant difference between a .40 and a 9mm wound, everything else being equal. There, I said it.
You mean like bullet weight and velocity? There's no difference in any two (or three) bullets, "everything being equal." Problem is everything is not equal.
And that's why everyone's moving back to 9mm-- the new bullet designs (HST, etc.) make 9mm statistically as effective as .40 and .45. !!!! But cheaper to shoot, more capacity, less recoil, etc.
So you can give us a links to those statistics???
"Statistically" the .357 is still the most effective man stopping round, with the 125 gr. having a slight advantage over the 158 grain.