For the giver, resources are limited. For the steward, resources are limitless. For a giver, giving comes last. For a steward, giving comes first. Givers think about dollars.
Stewards think about percentages.
A giver gives what they don't need. A steward gives what others need. Giving is about your heart. Stewardship is about God's heart. If the world were filled with good givers, the world would be wonderfully different.