Originally Posted by
zyxlsy
The reason I excluded Visa is that I've tried numerous times to gain data letting me decide that Visa is so bad dealing with FX when fully-market-driven currencies are involved. If it is the case that Visa is better than MC for EUR, I do need to do some more tests to see whether things have changed.
Both MC and Visa post exchange rates on publicly accessible web sites. I include links a bunch of posts back. You might pick some days and compare.
Based on the dates I tried, MC is always better than Visa, although the spread varies from insignificant to not so insignificant. It's possible the dates I tried were not representative.