You will burn over twice as much methanol for a given amount of power as you will gasoline.
All Idid was point out the volume prices. My statement was true. You changed the subject slightly by stating the total energy price. However that is not the total story. In small engines the power per unit size is important, that is why 1/2A engines use so much nitro. Because of this all the gas engine will do is put put around the sky, or the engine will weigh too much. The extra weight is not a big problem with large planes, but it is important in small planes.