You really have to understand that each card market has different benefits. Another example, your Priority Pass from the Canadian AMEX Plat will admit you to the United Clubs worldwide while the US Plat customers have the Priority Pass Select cards that black out the United Clubs.

Similarly, someone on here made a very good point about AMEX cards in non-US markets being primary rental coverage. A couple years ago I made a claim with my AMEX International Dollar Card for damage that Hertz claimed after the fact was something for which my additional card holder was responsible (the rental was charged to an IDC card). IDC not only took over the case (and I never heard from Hertz or AMEX again), but AMEX IDC's first question was why I did not use their Hertz Platinum/Centurion corporate rates because they even include Hertz Collision Damage Waiver and supplementary Hertz Liability Coverage at no additional cost. Wow, that was the first time I heard about that benefit and clearly the complimentary collision damage waiver is not offered with the US Plat card... Since then, I have been frequently using the IDC Hertz rates because they are not only competitive, but because I also know if I ever have an accident, Hertz will take care of the issue without even contacting AMEX.

I think we are often in a situation of wanting it all... having our cake and eating it too... we all focus on benefits offered in other card markets without comparing the benefits we have which the US card does not offer. Yes, I miss out on perpetual DL Platinum status offered to US Cents, but I have enjoyed Cathay Pacific/ One World Emerald the last few years provided through IDC (and also Canadian cardholders have received similar levels of One World status in that card market). Also I've had the Virgin Atlantic Gold status through IDC which now does qualify for low level priority on DL domestic upgrades, although with Diamond I really never use that benefit, but Virgin is no longer provided in the US market. (Intriguing for many international cardholders who have Virgin status with AMEX and fly Delta will be whether they will be at a distinct advantage in 2015 and continue to accrue award miles based on DL flight miles rather than on $ paid in the Sky Miles program. ifSimilarly, some of the international programs offer Hilton status which the US Plat does not offer. Also many international cards include free supplementary cards while the US does not.

Thus, I think it really boils down to which currency you prefer to have your purchases charged. Similarly, if you are a Canadian resident but prefer charging in US dollars, you may want to look at the UK International Dollar Centurion card, as their benefits may also prove competitive depending on your specific desires. Also some of the non-US market cards offer robust worldwide travel insurance whether or not the trip is charged to the card, while generally coverage in the US market is only provided for travel charged to the card. About 8 years ago I had cash stolen in Eastern Europe reimbursed as a statement credit after providing a police report to my non-US card while the US market would have never contemplated such a claim.