If you compare the amounts and it's the same; use those already entered.
If not, as said, enter your own.
You never know where the person who put the info in lives (if it wasn't a SP entered item, but entered by a member instead).
Not only do manufacturers change their formulation occasionally, different countries have different rules regarding ingredients.
Takes longer, but I usually enter my own - especially if I know I'm going to be using it regularly