If you are looking to have healthier or faster growing corals, then IMHO absolutely NO, it's not worth the difference. Light is light is light. A $100 MarsAqua can grow coral just as well, or at least close enough, that the cost difference isn't worth it.
If you want control over how the light in your tank looks (color control, intensity control), maybe the extras on the Radion are worth something, but $1300 extra? Just what are you getting for the money?