That large a disparity would indicate one of the judges is wrong on style or being able to perceive flavors.
I would expected flavor perception would be effected if they've been judging a lot of beers. The palate gets bombarded.
Also, I've seen experienced judges clearly not know the style guideline, but act like they know it all. It's not hard, they can always look at the guidelines to be sure.
It could also be a matter of exposure to the style. Knowing the guideline is different than having experience tasting commercial examples. For instance, many Americans, even judges, would not recognize an English IPA as an IPA, even when accounting for a lower IBU. If they don't have a frame of reference, they simply don't know what its supposed to taste like. Taste as many English IPAs available here or spend some time in the UK tasting different IPAs and you'll understand. The same goes for any style.
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