Are they reading the same rh?
I have owned both I found the accurites to be in accurate. They are speced at +/- 2 degrees centigrade about 4 degrees Fahrenheit. They last I checked were 15% up or down rh. Some say they are accurate but I have never found one that was the best I have seen was quite off.
Personally I use an analogue one ment for cigars. Like this one,
http://www.amazon.com/gp/aw/d/B0007V...sr=8-3&pi=SL75
It can be calibrated with a salt test and is robust unlike most digital resistive units.
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