Could you get into more detail please? From my (brief) experience with your products I think the differences are indeed mostly in the plugins, apart from cosmetic / UX ones, like different keyboard shortcuts (which by the way never made sense to me).

There's nothing wrong with selling sets of plugins by the way. I don't really get why it must be different IDEs though.

BTW, to avoid ambiguity.... I am not a JB employee, my source is/was a JB employee.