TL; DR: the flake sizes are different, so when using volumetric measures ("quarter cup", "tablespoon") the quantities/masses will end up being different. For sprinkling by hand it doesn't make too much of a difference, since you're probably just eyeing the coverage.
Recipes tend to use DC since that's that professional chefs tended to use.
("Morton" = "Windsor" for any Canadians out there.)
* https://food52.com/blog/16824-you-re-not-crazy-there-is-a-di...
TL; DR: the flake sizes are different, so when using volumetric measures ("quarter cup", "tablespoon") the quantities/masses will end up being different. For sprinkling by hand it doesn't make too much of a difference, since you're probably just eyeing the coverage.
Recipes tend to use DC since that's that professional chefs tended to use.
("Morton" = "Windsor" for any Canadians out there.)