And there never will be, for obvious reasons. It will never be revealed by political partners, nor private companies, all who may have prestige to lose.
But valid conjecture, none the less.
If the contracts were signed prior to clinical trial completion, and prior to the completion of such production capacity, and there was no priority order built into either contract, the chronological signing order of such contracts is irrelevant.
For sure, if the production line was complete and already producing, your argument might stand up, but it wasn't and it doesn't.
it will never be revealed because you've made it up to satisfy your own delusion.
the vaccine was in development stage, but at the time of contract signing production was already being geared up, and so the production run was already being decided and implemented.
this is why az said the vaccine for the eu was 3 months behind, the vaccine takes time to grow and it is difficult to speed it up
in order to get the drug to market asap production and build of the production line was started the moment the contracts were signed. If the vaccine turned out to be a dud, they would have just shutdown the production lines and burnt everything. the contracts advised that it may not work and there were clauses meaning that AZ wouldn't have to provide a refund if the vaccine was found to be ineffective.