John Rumm wrote
Radio Man wrote

I think the Pfizer is more powerful because I've had both
vaccines (I am clinically highly vulnerable) and the Pfizer
gave me more side effects than the Astra Zeneca.

That seems like a leap of logic too far. For starters you would not
necessarily expect the same response to the first jab as you get to
the second, and you can only be a COVID19 vaccine virgin the once.

Its more complicated than that because the AstraZeneca
includes an active monkey virus, deliberately.