The three strikes law is a term that specifically refers to "habitual offenders". For instance, IF a person was convicted of a felony, then was released from prison and then went on to commit the exact same crime. If convicted for the second felony, then he would face the 3 strikes law. In which a court can determine the likely hood of the offender committing the offence again in the future, therefore, adds additional years of jail time.
Determinate sentencing is a sentence to confinement for a fixed or minimum period that is stated by statue. For instance, some crimes like 2nd degree can carry a no less sentence of 50 years of confinement( If convicted).