Biggest difference between miller "A's" vs. miller "B's" aside from the track is the distribution of the winter precip. Miller A's have a sharper line between snow and rain. Miller B's have a wider area of mix to the north of the transfer.
If that map shown earlier with this thing wrapping around (tilting) it would eliminate the miller b look that was on the table in earlier runs. Trying to find out if that map was on crack or had any legitimacy.