While it is difficult to compare them, the Moderna vaccine seems to have more side effects....being described as "unpleasant' and some grade 3 and 4 level side effects.
www.businessinsider.com
Here are the common side effects you should expect if you get Moderna's coronavirus shot
Moderna vaccine has no major safety concerns but causes temporary, expected side effects for most people, like fatigue, headache, and muscle pain.
