Comparsion for me is not about"fantasy".
It is viewing a player's approach, method, passion, technique, or way on the field during a game - that all of a sudden - sparked a thought in my mind that "hey....that guy reminds of [this running back ] or [that linebacker].
Yes, the Romo -Prescott debate include stats compiled, QBR, 4th qtr. combacks, etc. from season to season, plus the career overall; but it will be just as much about playing style, which QB was the starter when a fan first followed the Cowboys, persona, how many unreal plays and sensational games each guy produced.
However..refer back to thread title, and the OP's comment.
That CZer is strictly using playoff participation and results as his criteria.