As an update, my two digital hygrometers now seem to be in sync. They're reading within 1% of each other. This makes me feel better, of course.
This was not the case in the first day or two. All I can figure is that the newer one (Don Salvatore) somehow got over-heated on the truck during the shipping process (it WAS reading consistently lower). My original post was written on the day I got it. I'm not sure if this theory make sense or not, but things seem fine now.
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