I really don't care if air powered is more efficient or not. With me it would be the compressor noise, so I'll be sticking with my electric model.
NC via the Army in 1979; retired 1981, just east of Raleigh ever since.
Remember, when I tell how I do something, that does not mean I recommend you do it my way. Different backgrounds, experiences; what works for me, may not for you.
"It ain't what you're told, it's what you know." - Granny Weatherwax
No point in believing in things that exist. If they exist, you don't have to believe, they just are.