Hi Alexis, yup that is a good way to look at it.

In MoI the focus is on making it easy to draw something from scratch, and not so focused on adjusting an already created model.

123D is sort of the inverse - it's more clumsy to draw in it, but very convenient to make adjustments to existing models in it (or it would be if they can improve the performance).

So together they could be a good combination!


One thing also to keep in mind is that 123D is focused on generating output for 3D printing and not on making output for rendering programs (like writing OBJ or LWO files for example).

- Michael