What is the difference between God’s common grace and special grace?

Common Grace is the operation of the Holy Spirit among all men whereby he restrains the effects of sin, enables the positive performance of civic righteousness and relative good, and grants all varieties of non-salvific benefits.

Psalm 145:8–9—The LORD is gracious and compassionate, slow to anger and rich in love. The LORD is good to all; he has compassion on all he has made.

Luke 6:35—He is kind even to ungrateful and wicked men.

Special Grace is God’s particular manifestation of grace toward specific men whereby he saves them.

Romans 3:23, 24—All have sinned and fall short of the glory of God, and are justified freely by his grace.

Ephesians 2:8, 9—It is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God—not by works, so that no one can boast.