Pfizer or Moderna? Which one should I get?

Place I volunteer at just gave info that vaccinations are being done this Saturday for the first shot of Moderna. I just got an email from my boss that they're doing Pfizer on Sunday but there's a lot less doses and you need to reply to reserve a spot. Don't know much about either, which do you recommend. Btw there's 600 Moderna shots that are being offered and only 30 for the Pfizer.

Pfizer if you can, since you only have to wait three weeks for the second shot instead of four.

Both

If you have the option Pfizer is better with a 3 week wait.