Yeah, and there are a lot of PWS stations around here that are all over the place too. The spot I use closest to me along the Stowe Country Club golf course actually seems to run a tick colder than MVL, especially at night. There are all sorts of little pockets.
The departures from normal almost mirror MPV exactly though, so the departures seem to be in line with their 30-year normals.
I've always gone by the departures to see if something seems out of whack... like BTV always being +2 from the other stations.
The BTV/MVL/MPV triangle though all fit their long term departure patterns where MVL/MPV are almost identical, and then BTV is a degree or two warmer.