I don't have a clue what the difference is between Tylenol and the generic, if there is any. All I know is what I have been told several times by different medical professionals.
I don't know if it's the source, the color, the taste, the... whatever.
But, in my personal experience, I have found that Tylenol seems to be more effective for me than the generic store brands.
If I can't find Tylenol, then I do buy the store brand, but, so far in the current shortage at least, I have been able to find the Tylenol.
Maybe these folks are wrong and it's all the same, but I don't know of any reason they'd steer me wrong or make up something. And, they were different people at different times.
Maybe a conspiracy?
Bob