Results won't be the same, due to adaptive sampling - Corona uses the intensity of a light source in the scene (compared to other light source intensities) to decide how much processing power to dedicate to solving for that light. This is why you should not boost things in LightMix by 100, let alone 200, probably no more than 10 or 20 - because the result will be very noisy. So, best to set your lights to be in the right range of intensity in the scene, and adjust by smaller amounts in LightMix.