This is a subject that I'm also interested in. I've never owned a pressure washer before, but I've used a few of friends. All of them gas. Of course the gas models almost always produce more pressure than the electric. But I'm curious, for what type of tasks does anyone use the higher pressure for, that an electric won't do? In my thoughts, the disadvantage of gas is noise and smell. And of course increased maintenance, but I'm not too concerned about that part.
One of the most frequent jobs I'll use a pressure washer for is washing the cars. It seems that an electric model would be much more suited for this, since there is a lot of idle time between times of use. No worry about the pump or motor overheating during idle time. Is my reasoning sound, or not? Any other thoughts about this?
I hadn't thought about what APWillard points out, about the cord and hose coming from different locations. That seems like a valid disadvantage to an electric unit.