I've found that the planes advertised as glow/electric are generally built as you would expect for a typical glow powered airplane. They aren't super light as you might find with some airplanes intended strictly to be electric. What they do have though are provisions for battery mounting, easy battery access through a hatch or removable canopy, included hardware for mounting a brushless motor, cooling air exits in the fuselage (just cut away the covering) and so on.