The biggest difference is that no internet connection is required for the authentication because the bank trusts the user's device. CC number is randomized per transaction so that the merchant does not receive the real CC number.
I've seen cases contactless payment is not supported only for a particular brand and I believe it's because of missing software update on the payment terminal.
I've seen cases contactless payment is not supported only for a particular brand and I believe it's because of missing software update on the payment terminal.