Not that we really have room to argue on this, but
if it was in conference, head to head is covered by 'Order of finish in their conference'.
if it's out of conference, we're dealing with the situation where it's two teams who played each other in the out of conference game but ended with the same record and finished in the same spots (likely 10th).
Being that it's such a unique situation, and one that was determined on week 1, it's probably best to just let what's been carved out be the deciding factor.