What are the key differences between federal cases and state cases?

Federal cases are heard in federal courts and involve violations of Federal Laws or the U.S. Constitution, while state cases are heard in state courts and involve violations of state laws. Federal cases typically involve issues that affect the entire country, while state cases are more localized and deal with state-specific matters. Additionally, federal courts have jurisdiction over cases involving parties from different states or where the amount in dispute exceeds a certain threshold.