I would strongly disagree with both of these statements.

CapOne is an okay choice. But as we noted in our shootout a couple months ago, I'd choose Schwab over them, for the better customer service, the better rewards, and at least as good an exchange rate on average.

I have yet to see anybody actually prove that any card consistently gets a better underlying exchange rate (ignoring fees) than any other card. Rates vary widely from transaction to transaction on the same card. I had a trip one time where two purchases made on the same day in the same currency on my CapOne charge hit my account at exchange rates that varied by significantly more than 1%. So you win some, you lose some.

What I am pretty sure about is that CapOne doesn't charge any fee on top of the exchange rate, and AmEx does. But there are cards other than CapOne that don't charge fees (Schwab being my personal favorite) and there are tons of cards that charge more than AmEx. See the list of fees we've been working to compile. So I don't see how anyone can apply such superlative labels to CapOne and Amex.