The difference between the 3k NAM and the HRRR, the former of which shows some fairly scenic snow TV for all of Friday afternoon for most of the subforum, is largely the 925mb level. Also a slightly colder surface. The better runs of the globals/HRRR had the precip moving in earlier in the day. Now that it's later, the column isn't quite as snazzy, but 3k keeps it good everywhere but the surface. Others do not, but it's very close.