> According to who?

According to researchers who actually ran blinded tests: https://daily.jstor.org/the-coca-cola-wars-can-anybody-reall...

What's funny is kind of the reverse is also true: when people were given the exact same cola but one was labeled Coke and the other Pepsi, not only did they say they preferred Coke, but fMRI brain scans should more prefrontal cortex activation for the Coke as well: https://medium.com/@marketingoal/the-pepsi-vs-cola-cola-expe... . That's the power of branding.