The engine power really has no affect on fuel economy at cruising speeds as every engine in any particular hull would be making the same power at that cruising speed, so you can ignore that as a factor. A lighter hull has to push less water out of the way when planing so that will help with economy. Generally a narrower hull gets better economy than a wide one due to hydrodynamics. A helm adjustable trim plate will give you the benefit of coming out of the water quicker on starts and trimming the boat some to improve efficiency at cruise or higher speeds.
Most wakeboat hulls are very efficient at cruising speeds so economy is good there. At high speeds they suck compared to a sterndrive. or OB. You can join BoatTest
and research their findings. It's usually pretty thorough.
How you drive which ever boat you drive will make a much bigger difference than who makes the boat if you are considering economy as a major factor