Subprime is used to describe a group of consumers with damaged or no credit. Subprime credit card usually require a security deposit, annual or application fees, or higher percentage rates because people who apply for these cards have had credit problems in the past or have no credit at all.
Prime is used to describe a group of consumers with good or excellent credit. Prime credit card usually do not require security deposits or application fees. They also offer lower percentage rates and reward programs along with other benefits.