I don't remember the kit names, but all during WWII, I built many of them as part of my scout career (Cub, and Boy Scout). They were all pine, and only partly shaped, but not rounded in any way.
We were encouraged to follow the shapes carefully and to paint them all flat black. They were then given to the local Civil Defense Headquarters to be used to train US Army Air Corps cadets in aircraft recognition.
We were also encouraged to concentrate on several Japanese types, both fighters and bombers, and also Mustangs and Spitfires.
Floyd