The truth is, barring bad design or construction, the larger the plane, the better it will fly. That is why there is no correllation between how one of these .40 size kits will fly compared to a 40% kit. Even if in all respects the planes are the same, except size, there will be a marked difference.

You can feel the difference when you move from a .60 size to a 1.20 size plane, or from a 1.20 to a 50cc, etc. Each time you go larger, you will feel the difference.