Because the enemies are weaker in KRO.
Because KRO requires you to use your Call Reinforcements and Thunderbolt more frequently.
Because there is a hero spell, so having very powerful tower like KR and KRF is redundant.
Because KRO is meant to played with extra logic. Having higher damage means that a player can win a level easily.
Because KRO requires you to use your special towers throughout the levels.
Which number choices best answer the question?