what is the major difference between the judicial power of the Philippine Supreme Court and that of the U.S. Supreme Court?

The major difference between the judicial power of the Philippine Supreme Court and that of the U.S. Supreme Court is that while the power of judicial review is only impliedly granted to the U.S. Supreme Court and is discretionary in nature, that granted to the Philippine Supreme Court and lower courts, as expressly provided for in the Constitution, is not just a power but also a duty, and it was given an expanded definition to include the power to correct any grave abuse of discretion on the part of any government branch or instrumentality.