Thats simple, i tested at work on a good PC , but with no
3D gameing card, but that can do some 3D !

I tested two things :
- A8 engine with the last RPG template from AUM98.
- Then i tested DX Studio with a simple scene (one 3D barrier,
one light, one little piece of terrain mesh) and made an exe !

DX studio program was running so slow like only some 2 or 6 Frames / second) ; too much slow.
But A8 RPG template was running greatly and incredibly smooth.

For me that sort of little test really show what engine of the two have good 3D optimisations (somethings perhaps you won't see directly on a big big last powerfull PC) !

So yes, DX Studio even in the last version is too much slow, i think it's simple , Javascript is interpreted language also, and that's also one point that really slows it down !

For me it remains a little toy , or a little engine for 3D artists to play with but it's not for
making games using a good amount of effects and polygons as some of 3DGS indeed.
The only advantage i found was all the workflow and it's intuitive world editor and objects properties access !

Well just my test and my taste