Originally Posted by
TheManofaThousandPlaces
I did exactly that: applied for the TY Preferred and Premier on the same day. I got two inquiries. One of the decisions was instant (approved), the other took a couple days (denied, based on too many inquiries). I'm not even convinced the same dept at Citi is managing both TY card approvals.
Interesting, so it's very YMMV. About the only sure thing is that the two AA cards (Visa and Amex) can be applied for simultaneously for just 1 pull.