The wholesale rates for credit card processing (called interchange rates) are available online at visa and mastercard's websites (search for "visa interchange rates"). Without getting into details, all card-not-present transactions, regardless of card type, are more than 1.45%.
Braintree's pricing is not the lowest, but I bet if you looked carefully at your statement from Wells you would find that it is worse than Braintree - some of the worst processing deals I have ever seen are from Wells Fargo.
If you want to make sure that your processor is not pulling funny business with downgrades, insist on Interchange Plus pricing (http://feefighters.com/blog/interchange-plus/). Or just a completely flat rate with no downgrades.
And then monitor it closely, this is one of the most crooked industries on the planet.