I agree with DemforBush, stuff made with corn syrup just doesn’t taste as sweet to me as stuff made with sugar. But since there is a question on that, I’ll have to do more research — by eating and drinking some more stuff made with both.
"Knights of the Round Table, let's drink to see if the wine is good. . . . "
The first is good, but the second might not be, so let's drink to make sure it's still good . . ..
and so it goes . . ..
DemforBush said that corn syrup doesn't taste the same as sugar (sucrose). It doesn't. Even high fructose corn syrup (not nearly the same product as corn syrup) tastes different than sucrose -- at least it does to me. Although, HFCS is a very close substitute for sugar, which is one of many reasons it gets used.
Maybe the quantity of sweetener being used in a particular product is the reason you're sensing more or less sweetness.