I think you're right. If it's on a different board, it's not the same chipset, and therefore considered a different game.
Ex. -- I have Galaga, Mappy and Xevious on the Namco Arcade Classics Vol. 1 board. High scores on those games wouldn't count as the same as those games on original individual hardware boards.
It would probably have to be put into a different category.
I'm a TG ref as are another few KLOVers. No that PCB cannot be used to compete on the Millipede track(s) that Don has the record on. Feel free to shoot me PMs if there are any TG related track questions anytime.