Transactions in London on 13 Feb 2016:
Citi Prestige MasterCard
In all cases Citi shows the Transaction -and- Posting date the same
9.45 = 13.65 = .6923
14.66 = 21.17 = .6925
18.39 = 26.56 = .6924 (1.44)
American Express SPG (Business)
4.80 = 6.97 = .6887
1.95 = 2.83 = .6890 (1.45)
Some of this apparent difference is rounding. Both currencies are denominated to two decimal points. If I rounded everything at two places both exchange rates would be 69 pence per Dollar. With differences of this magnitude I choose the card based on features or rewards rather than exchange rate. American Express SPG has Contactless payment feature -and- the points transfer to airlines 1:1.25. Citi has wider merchant acceptance, 2X for dining and entertainment.
Last edited by mia; Mar 12, 2016 at 12:01 pm