Do you even know what the hell a double blind study is?
What you're describing is not a double blind study.
Do you? What I described is a double blind study.
But to make it clearer:
Person A sets up product 1 and Product 2 and Labels them as X and Y.
Person 2 performs a study with people asking them to compare X and Y.
Person 2 has no idea if X is product 1 or Product 2.
In fact, for all Person 2 knows, X and Y are one and the same.