What are two Supreme Court cases which address the legal issues found with sentencing disparities?

The brief(2)should includethe following:

1. State the facts of the case as per the court brief.(this portion is not opinion based)

2. Provide the final ruling of the case.Was the case affirmed or decision reversed.

3. Provide a summary of the majority opinion of the Court.(Again,this portion is not opinion based).This summary should provide justification to why the case was affirmed or reversed based upon law applied by the Supreme court to reach its decision.