On the subject of the jquery.payment lib, I remember noticing that the validation functions it provides for various credit cards are not exactly the same as the ones in stripe.js, and actually better.
I would have to look at my commit history to remember what exactly were the differences though. I think it could match the various credit card types with fewer digits entered or was better for cvv validation of amex cards.
I get the impression that stripe has abandoned jquery.payment (or at least it's a side project and not part of their core offering?). Because it does not actually work out of the box with the stripe.js library (see https://github.com/stripe/jquery.payment/issues/160 , which has a lot of "+1's" from other people but no response from stripe or whoever it is that maintains this library).
I never noticed because I'm actually using stripe.js to do the payment, and was only using the various validations from jquery.payment in a couple angular directives.
I realized stripe.js had validation functions built in one day looking into the source, and that's where I remember those validations acting differently from.
I would have to look at my commit history to remember what exactly were the differences though. I think it could match the various credit card types with fewer digits entered or was better for cvv validation of amex cards.