OP said _payment processing_, and then parent said
> they are all essentially the same when it comes to functionality and pricing because they are the middlemen between you and visa/mastercard/... and not much else
Which is false, as there are many payment providers using fixed cost models and not touching the CC networks. And in a lot of countries this is the main method of online payments instead of credit cards.
I would not say it is exactly the same as in the US.