I've come up on this so called problem a few times. A few years ago I was at AGDC with a demo, people were asking what engine it was and I wouldn't say 3DGS, it does terriable. I'd always call it Acknex 6 (or 7 now) or A7. This is the engine, and then one person from a uni wanted to know more about it and I replied saying that the engine comes with a package titled '3D GameStudio'. Really, 3D GameStudio is the package and A7 the engine and only people in the indie industry are going to connect the two so it is a fairly decent get-around.
Just my two cents on it