Ascribing logic to USCIS? You sweet, sweet soul...
Seriously though, the logical approach is to make everything as simple as possible for the IO to understand. Hilariously enough, I have seen USCIS issue an RFE for a divirce decree for a couple that had a court marriage and a traditional/customary wedding.
I'd rather not pin my immigration hopes on the belief that an overworked adjudicator can figure out why a married couple had two ceremonies. They should be able to, but they should be able to send GCs of the correct length too.