I am not sure, although it seems to do a better just in general, but I am not sure if it's v-ray doing something special or mental-ray / maya not having some super secret switch or dial adjusted. It's certainly easier and more intuitive to set up though.

Intuitively, the issue for aliasing and displacement, is that any anti-aliasing would be interpreted as displacement. So the only solution would be to increase the image map resolution to increase the pixel density. But that is limited by the physical pixel size of the display.