For the diagnostic test, they don't control for amount of input. They just take the swab sample, prep it and run it, which is suitable for a +/- result. But you are absolutely right, it is hard to make comparisons for viral load without controlling input. Also worth noting that the swabbing technique to get sample makes it nearly impossible to control input. That said, those are some super high viral loads. In fact, the CT values (less than 15) are too low for accurate comparison. RT-PCR accuracy zone is between 20-35 cycles.