They are different but both fun. I used to like
MVMCP more than
MNSSHP back when it had the Night before Christmas stage show. Now I might lean a tiny bit towards MNSSHP just because you have the added costume watching but we do something Christmas themed for MVMCP too. You still have lots of characters, the same rides, good fireworks and cookies/drinks instead of trick or treating. Both parades have their highlights too. These days there's more similarities about the two than differences. Theme is the biggest thing.