If you want to make your own opinion come see my tank and you will see first hand. I have a 10ft tank lit by 4 Radions on one half and 4 AI's on the other. There is a considerable diference but I dont want to start an all out debate. However, without putting them side by side and giving them a month to really compare how are people giving educated answers ? Answer - they arent. I can give you an un bias opinion saying that the Radion hands down is a beter unit for the following reason. Light spread is much better, the whites give a much crisper brighter look(people coming from Mh will know exactly what I am talking about), shimmer lines much better, program is incredible, and last but def not least my corals look bettter. Do I feel they are worth the money they are asking......no but they are good....very good. And did I mention I ordered four more Radions.
Ask me how much better everything look with the superactinic VHO's on as well....:splitspin well that my friends is a whole other discussion.