NY state is counting the untested dead who displayed similar symptoms as having died of covid-19. That may account for about 40% of NY’s numbers, given that 10,000 dead suddenly became 14,000 dead. Other states haven’t begun counting their covid-19 dead that way. NY’s population also skews older:
http://www.usa.com/rank/us—median-age—state-rank.htm
Note that a number of other states fare worse than NY’s (% dead vs total cases) before NY bumped up its dead number to include the untested deceased. MI’s %, without stacking on the untested, is about the same as NY’s test+untested %.
https://www.worldometers.info/coronavirus/country/us
Untested, how are COVID-19 symptoms different than flu symptoms?