The Citi® / AAdvantage® Executive World Elite Mastercard® and the Delta SkyMiles® Platinum American Express Card are both tailored for frequent flyers, offering airline-specific perks. The AA Executive World Elite is the better choice for American Airlines loyalists due to its Admirals Club membership and higher rewards rate on AA purchases.
However, the Delta SkyMiles Platinum is worth considering for its valuable companion certificate and lower annual fee.