Both will grow LPS and SPS but the pro has a few diodes that the blue does not so it gives you a bigger range of color. Since most reefers program their lights to go heavy with the blue anyway and since blue is the light coral need to grow, eco tech replaced a few of the less used diodes with blue. I think they replace warm white with cyan and green with a lime colored diode. So if you run a mostly blue spectrum, then you have more diodes working for you. I guess you could probably get more par with the blue if you’re running a heavy blue spectrum. It really doesn’t make a difference either way and most people are just going to use one of the pre made templates for their spectrum anyway.
