I'm definitely not an ASOS expert, but I honestly think the DDH ASOS is under reporting a bit. We all know that Bennington downslopes like a champ, but I have been looking at the DDH obs for a while and they just always seem a little lower than some of the PWS around there. (I know PWS are more likely to not be calibrated correctly).
Also, I think they are losing precip totals in the winter months because so many snow events are very windy. Maybe @dendrite or someone else can chime in on how effective the ASOS catch basins are at collecting snow in windy conditions. I just think in a windy location the cocorahs totals are probably more representative of total precip. Maybe I'm off here and the precip totals are 100% accurate. I'm not saying they would have 50+" of precip, but maybe 40" to low 40s". Even with that you still have a large discrepancy.
For comparison I had 50.15" precip for 2020 /Calendar snow 103.7" also in the valley, granted a better spot than DDH.