KX 125 vs YZ125 2 stroke?

Witch one has a harder hitting powerband? I'm 5'5 and I weigh 125 pounds and I was afraid to go past 3rd gear on a 185 4 stroke Dirt bike but the engine was from a old ATV and I rode it 6 months ago. Witch one has more power witch one has more bottom end middle end and high end and witch one is more fun also witch one has more torque