Depends.

If you can stay out of the happy pedal, the mileage should be better, because you are recapturing energy lost out the tailpipe. In short, you reach the desired speed quicker, upshift quicker, and downshift less often. All these mean you pump less air thru the motor, and thus burn less fuel.

If you are like me, the mileage will be about the same, but it's a wheee to drive...

Not responsible for advice not taken...