Which concierge service is better? VISA Signature or AMEX Platinum/Centurion?

[Anonymous]

I kinda sorta prefer the one from AMEX. But just because I have always spoken to the same person.

[smc733]

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@Anonymous wrote:

I kinda sorta prefer the one from AMEX. But just because I have always spoken to the same person.

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I hear a lot of people seem to say the Visa Signature service blows the Amex one out of the water, but this depends on the particular card...