I did learn of this difference many years later. To me the Ceylon kind is a nicer, though perhaps less strong a flavour and seemed more like whatever my brain has decided “cinnamony” should taste like, but cassia will give you a more obvious punch even if not quite as delicious. I wonder if at some point Masterfoods switched from Ceylon to Cassia.
It is very possible it was made with a different cinnamon.
There is cassia and ceylon cinnamons that have different flavor profiles.
I did learn of this difference many years later. To me the Ceylon kind is a nicer, though perhaps less strong a flavour and seemed more like whatever my brain has decided “cinnamony” should taste like, but cassia will give you a more obvious punch even if not quite as delicious. I wonder if at some point Masterfoods switched from Ceylon to Cassia.