Sorry, I'm not sure I follow. Do you mean the Platinum?

It all depends on whether you maximize your benefits or not I guess. I signed up myself + 3 family members for Global Entry (-$400). Add the airline credits (-$200), Priority Pass for all four of us + Centurion Lounge access for our upcoming trip, SPG Gold for all four of us when we're not travelling together, and that covers the fees and more.

Then add free medevac through AMEX (for you and your family, whether they're AUs or not, and whether the trip was paid on the card or not), free Shoprunner, free Boingo WiFi, and that makes up the the extra $50 in AF difference after airline credit, for me at least.

The only two things I see the Prestige card having over the Platinum is a) the free 4th night at hotels, but I rarely pay for hotels (it's either business travel or I'm burning points earned from business travel), which gives me little value, and b), the travel delay insurance, but CSP card does it better in that they don't require the entire trip to be paid on the card (so awards travel is covered if you pay just the taxes on the trip w/ the CSP). The Citi version of Priority Pass allows guests while the AMEX does not, but my family all carries Priority Passes anyways since AMEX extends all privileges to AUs as well.