Why do you even need DJs in the mix?
If the subject of the evaluation is purely the gear, as the options suggest, and the same program was being broadcast through each, and there were no obvious flaws with the presentation of the rig, I think it is a no brain-er, Sound Clarity (Bass, Mids , Hi).
Only One bride in 25+ years has ever show any concern with equipment and she was only asking because she had been to a recent reception at the venue/wedding mill she had chosen, one that includes the "free" "dj" (waiter/busboy if you decline the offer), and the house system was horrendous. She simply didn't want me using the house system and wanted the same rig she had experienced at a friend's wedding, that we were fortunate enough to have been the entertainment.
If, as your proposition suggests, that the judgment is more system AND dj, the debate is purely subjective and the options presented are not sufficient.