Vanilla *is* inferior to PTW and C3C. It is very difficult to make a decent scenario for Vanilla, although you can do decent mods. It's not insulting to say that - after all, if C3C were no better than Vanilla, they wouldn't have released it! The fact is that C3C is specifically designed for scenario making (the Conquests of the title are just scenarios). This means that anyone who's interested in making scenarios probably has C3C and will only make scenarios for it.