Fiberglass vs. Graphite Paddles, what’s the difference?

Fiberglass paddles often weigh a little more that graphite paddles. Because they are a little heavier than graphite paddles, fiberglass paddles are considered to have more power. Graphite paddles are considered to have more control or finesse. Both graphite and fiberglass paddles are lightweight and strong. There is a general perception that graphite is better but no one has studied if there is a difference in how the ball comes off a graphite vs. fiberglass paddle.
What do you think? Is there a difference between to two paddle face materials?  – anna