Which game is better, Halo: Reach or Gears of War: Judgment?

Which game is better, Halo: Combat Evolved or Gears of War?

Which game is better, Halo 2 or Gears of War 2?

Which game is better, Halo 3 or Gears of War 3?

Which game is better, Halo 4 or Gears of War 4?

Which game is better, Halo 5: Guardians or Gears 5?