and lets remember no fuel surcharge on Usair
Well there is an "award processing fee" that you don't have with CO.
And US charges $$$ for date/routing changes that are free with CO.
And they don't allow changes to partner tickets after travel starts that CO does allow.
And they don't allow OW redemption like CO does.
And F redemptions to places like TLV are higher than CO.
And no expanded elite availability like with CO.
All in all it's not bad, but it ain't CO.