User blog comment:So-Pro Warrior/Nostalgia Tournament: Optimus Prime vs War Machine/@comment-4476906-20120330133806

Close: Optimus. The energon Ax is larger.

Mid: Even. The mini gun will send multiple bursts, but the AR is more accurate

Long: The repulsor and uni will do more damage than the Ion alone.

Special: The shoulder mounted rocket launcher fires multiple rockets.

Overall: War Machine. He has better weapons that can damage Optimus and kill him. Also, WM can fly.