There are two major networks, but many vendors of credit cards, with very difficult qualities from each other.
If you have any problems, it's the vendors you will deal with and who decide things like your credit limit, how often that's revised (up or down), whether payments are blocked and how to unblock them, how you are notified about transactions, whether paying off the card turns into credit instantly or takes a few days, your interest rates, whether the interest is applied immediately or not, whether you have balance transfer and money transfer, whether you have 0% transfers, cashbacks and other deals, and the kind of customer service you get (whether it's on the phone or forced to be via chat, whether they answer quickly and are helpful or take forever and are not), and whether their website and app are down "for maintenance" regularly.
Almost everything you'd care about is up to the vendor of which there are many, not the network.
There are two major networks, but many vendors of credit cards, with very difficult qualities from each other.
If you have any problems, it's the vendors you will deal with and who decide things like your credit limit, how often that's revised (up or down), whether payments are blocked and how to unblock them, how you are notified about transactions, whether paying off the card turns into credit instantly or takes a few days, your interest rates, whether the interest is applied immediately or not, whether you have balance transfer and money transfer, whether you have 0% transfers, cashbacks and other deals, and the kind of customer service you get (whether it's on the phone or forced to be via chat, whether they answer quickly and are helpful or take forever and are not), and whether their website and app are down "for maintenance" regularly.
Almost everything you'd care about is up to the vendor of which there are many, not the network.