Here is a simple comparison of the severity of first and second jabs using only the Yellow Card Reports. It is not definitive but general guidance.
Over the last five weeks or so, the rate of death from the second jab is 2.90 times that from the first jab. The adverse reactions are similar at 2.88 times.
One thing to bear in mind, though, is that the second jabs will be given to people a few years older than the first jab. However, if one takes the relative severity from the beginning of April, it is about 2 times. A longer period tends to rule out age effects as the spacing between jabs has less influence.
The bottom line is that one is 2-3 times more likely to suffer adverse reactions or death from the second jab than from the first jab.
Not much use without separating out by vaccine type.
Zoe (and other global data along with yellow card) shows AZ side effects are mostly after dose 1. Pfizer mostly after dose 2.
Moderna looks to be a split.
It is always useful to look at the wood before looking at the trees. If I get time, I will prepare a comparison.
Why do you always put blind faith in the Yellow Card reports? What methods are used to ensure a vaccine is necessarily the cause of some event?