The CoCoRahs website lets you do 90-day custom maps. I set it for Dec 15 - Mar 15, because that is a pretty good sense of climo. Any storms outside of that window would be missed in my analysis. The favored regions each winter were:
2024/25 - South and east
2023/24 - Central (MoCo through Baltimore)
2022/23 - Everyone lost
2021/22 - Fairly uniform, south a bit better than north
2020/21 - North had a dominant advantage
2019/20 - Another dead-ratter. Better north, but we're talking 4-6" vs 0-2".
2018/19 - North and central much better. Hwy 50 as a dividing line
2017/18 - Best in the north and east. Another sub-10" dud for most.
2016/17 - Marginally better north, yet another sub-10" year for most.
2015/16 - Almost everyone got to party! MoCo with some of the biggest totals.
So, obviously it is better to be north over the long run and they had a nice advantage in the 5 winters post the 2016 blizzard. Since then, they have been worse versus climo than central or south.