I assume Jay Peak is reporting or stating snowfall of at least 3,000ft in elevation possibly 3,500ft or even higher. If you ski glades right under the tram that snow is always very deep. I know some of the folks at Jay and have watched for a long time, along with knowing how Stowe was prior to I really wanted to normalize it a decade ago, and the snow may not necessarily be "measured"... at either location. It's hard to know. Estimating snowfall by skiing/riding and just a general feeling of it can be misleading at times. It's not even that wrong, but ski area reporting was for a long time (and still is at some spots) a more estimation and overall "feel" than it is actual stationary measurement.
Even if a ski area marketing or snow reporter calls Ski Patrol for snowfall when they can't get out at that moment... often that data is "someone just skied trail XYZ and said 2-4 inches, of course it's blowing around and hard to tell." It always ends with "it's hard to tell" which is honest too. But that can end up on some snow reports, and it's not even necessarily wrong. If the skier and rider, customer, enjoys what they also think is 2-4 inches blown around, it's good. Maybe you had a controlled site and it was 1.5" but 4" was added to the season total because it skied like 2-4 inches. That happens without a permanent mark to measure against. But, does it matter or is it wrong if the day's skiers agree it skis like 2-4"? I don't think so to be honest, it's just a different metric.
I'm a snow weenie. I've got a few other folks hooked on creating a longer standardized record on Mt Mansfield, the history of the mountain seems to inspire participation. Hopefully it can continue.
But despite the differences in the ways the seasonal totals are arrived at, in a whole spine of ski areas, they fit meteorologically in the larger picture of the Green Mountain and New England climate.