From my research, the stability of an Extra makes it easier to control, and less prone to stalls than an Edge. Either one is going to be less demanding than a Cap or Giles. A warbird is considered more demanding to fly and less forgiving of pilot error than the sport stunters previously mentioned, if one wishes to compare. Any over-powered pylon racer or other plane built primarily for speed is going to require the most advanced skills and knowledge to fly properly, as they are generally a prelude to turbines. OK, so with my raw data I could probably make up a chart. It would show high-wing trainers as being the most limited yet forgiving, then Cub variants and low-wing trainers. The Extra would be positioned just above them, with the Edge a little higher but below a Cap or Giles.

NorfolkSouthern