I perceive Amarillo as having a lot of apricot, especially in the aroma. Fruity aromas are typically esters. so I would have read the peach as Amarillo, not a yeast contribution. The yeast contribution would be very low, and usually, if present, covered up by the hops. It takes a real good pallet, better than mine, to tell the difference. This is a beer to be drunk young, as the hop character, especially the aroma and flavor will fade with time. Not knowing the age of the beer, this may be part of the impact. The judge has no idea of what you put into the beer, it's age or how it has been handled through its life, only his senses to guide him.