How much more fuel efficient is a manual honda prelude then an automatic honda prelude?

I own a 97 base automatic honda prelude and I like it alot. But I now crave a manual because its more fun and you feel more in control. Well just out of curiosity how much more fuel efficient is the manual then the automatic? and how much faster is it? I don't race, I am just a daily driver, and do you think I should have gotten the manual instead?