Just my own anecdotal evidence, nearly everyone I know experienced sore arms, mild headache, a little fatigue, regardless of which shot and which dose. The exceptions were my SIL, who did experience very strong flu-like symptoms, diarrhea, nausea, chills, and one BIL, who had a similar, but slightly less severe reaction.
My mom, ever suspicious of the medical community and the government, has determined that the lack of reaction she had is evidence that "us old people" did not receive a vaccine, just a placebo, because "they're not gonna waste good medicine on folks who are our age - they want us out of the way!"
