Balance plates. Who's right, Who's wrong

each plate was mounted on the crank individually and produced 2 different balance results, the objective is both should have produced identical results

Good info.

What I’d do is balance the crank with whichever plate would suit the immediate need(auto or std).
Then modify the other plate(if possible) to duplicate the imbalance of the first one.

Quick thought……..is one of them for a Magnum?