Formosa 2 is bigger than the original Formosa and therefore needs a bigger and more expensive power system. It also has bigger control surfaces, more in line with 3D stuff. The original is more like a miniature pattern plane. Mine ended up much heavier ( --> faster) than my E-Starter so the jump was pretty big. The Formosa goes where you point it and the weight of my big battery made my pointing a bit slow for the speed it flies at... I crashed a couple of times but some patience and glue kept it flying. And it is still flying.