It looks like Moderna will be the first to hit Warp Speed.
Last I heard a single FDA EUA committee would review both drugs, and likely approve both at the same time. The review would be of material, conclusions of the prior IND committees that reviewed each vaccine.
That's a possibility. PFE pushed out due to their greater volume to healthcare workers, and multiple comorbidity folks. Vaccinations limited to local distribution State/hospital centers.
Moderna currently is setup as the long term winner. But it's production capacity is lagging. I'm assuming PFE doesn't eventually prove its vaccine is also stable at -4F. We need to research current and projected Moderna manufacturing capacity.