Cleared by arrest is a term used in the legal sector to designate a situation where a law enforcement agency considers that a particular crime will be resolved only with the arrest of the perpetrator, when the perpetrator has already been arrested, the charge to the commission when the offender has already been directed to court to go through the trial process.
Answer: The main difference is that Federal courts were established in the U.S. Constitution and are controlled by the Federal system, while state courts were established in each state and controlled by them.