Given a choice, I would choose Pzifer over Moderna, since it has fewer side effects [1], but otherwise they're both good and protect approximately equally against known variants. I wouldn't choose J&J or AZ if my age is below 60yo because of a very low risk of deadly side effects (clots).
Edit: unless my BMI > 30, in which case any vaccine is better than no vaccine, because of the increased risks of covid-19 on high BMI.
Edit: unless my BMI > 30, in which case any vaccine is better than no vaccine, because of the increased risks of covid-19 on high BMI.
[1] https://www.europeanreview.org/article/24877