The NAM looks fairly close to the Global Models... which only lends itself to the fact that we have very good agreement in the models.
While I understand that being close to the R/S line will result in big differences in terms of total snowfall with only small changes in track, It is silly to stress out over small run to run details...
I would be looking for any last minute major adjustments of the models that will lead to significant bust or boom.. otherwise.. this is all just noise