Originally Posted by
MDtR-Chicago
Take the flight-related benefits of the AA card out of it. The free checked baggage and priority boarding are tied to the AA account of the cardholder, not the card itself. You should be receiving them no matter which card you use.
Right, it's tied to your AAdvantage number, so you should get the benefits as long as your AAdvantage number is on your reservation, no matter what card you use to purchase your ticket.
I would use the CSP as well. It has the 7% annual dividend, plus the built in travel benefits. But those aren't particularly significant, and I would base my decision on whether you prefer UA miles or AA miles. If you have no preference whatsoever, then I would use the CSP, since it has the slight earning edge.