Points and miles are simply two different ways to describe the same thing: the rewards you earn on a credit card. As an example, many popular Capital One credit cards earn miles, whereas cards that participate in Chase Ultimate Rewards accrue points. There’s no appreciable difference between the two words.
This gets a little more complicated when you begin discussing cash-back credit cards. Some of these show earnings with a dollar amount, while others show cash-back rewards in points. However, here too there’s no significant difference. It’s simply how the card issuer chooses to describe the rewards you’re earning.