Originally Posted by
lbbzman
Except it's stated upthread that US does not even credit BIS miles on partner metal for MM proposes, whereas AA does. So while the disparity is nowhere near what it would have been had AA still credited all sources of miles, there is still slight disparity.
Cheers,
LBBZman
Good catch. My point was simply that defining a model for parity is going to be wrought with challenges.