He's way better at measuring than me is one big reason. LOL
The other is probably topography. His spot is tucked back and heavily wooded. I'm thinking he gets shadowed a little in these sideways rain events, whereas my lot is much more open and I don't have my Stratus in the woods. It'll be different in snowfall retention battles. His spot can only be described as a weenie's dream. Zero exposure. The snow must sit in piles in there for a very long time. My back lawn gets absolutely baked, on the other hand.
I always defer to his readings as the final verdict, I am providing mine just as a data point. I wouldn't suggest basing a scientific research paper on my numbers. LOL