

The First to Turn Against God vs The First to Turn Against Tabs
Saitama, the First to ever break their Limiter and Achieve Limitless Potential through an exponential Growth of Power in the Universe of (One Punch Man) being capable of eliminating all his opponents in a Single Punch.
VS
Saitama, the First to ever be Completely Unkillable and Unbeatable being able to eliminate any Unit with a single punch, instinctually dodge every attack, and soo powerful not even falling out of bounds would end him. Trying to kill him with a Balista Bolt would be as effective as trying to kill him with a Balista thrown at him.
Who wins if the two were ever to Fight? In Tabs Saitama legitimately does not take damage, and in One Punch Man neither does he.