So you're saying despite having better fraud detection, your false positive rates (orders that would have been non-fraudulent but rejected anyway) are _also_ lower than the competition?
This is definitely something you might want to put in your marketting, but also back up in some way.
As a general rule, I'm going to assume any reduction in false negatives has some increase in false positives. If the general rule is not true in your case, I'm going to need to be convinced. :)