I don't think that the particular version of mame matters for vertical. Any version can be configured to display vertically.
I have an ArcadeVGA card feeding into a 19" arcade monitor. All of the resolutions for vertical games are arcade perfect(or close). With horizontal games it has to stretch them vertically so you lose some picture quality.
If the vertical games are a 10 on picture quality, I would rate the horizontal games as a 7.
Let me know if you would like any more input.
Craig