When it comes to comparing AI Sol and Radion here are the big factors in my opinion from testing both of the units here.
Color Choice:
Radion has complete control over the color output with full RGB spectrium. That means for instance when its sunrise the radion can put out a nice early morning yellowish color and slowly bring that up to mid day as you would experience on an actual reef. AI Sol can do some manipulation of the color but only with the limitations of which units you purchased (White and Super Blue). Radion definitely has more control on the light effects however their first version of their software is pretty poor however should improve soon.
Light Coverage:
Here I think the AI Sol wins, its LEDs are more spread out giving better spread throughout the tank. Radions light output is concentrated mostly underneath the relatively small LED pods.
Added Extras:
Radion can put your EcoTech pumps into night mode and feedling mode etc. For people that do that. Also compatible with the EcoTech battery backup.
Wireless Control:
Contrary to popular believe NEITHER of these units can currently be controlled wirelessly from your computer. The wireless control in the Radion is between the Radion and other EcoTech products such as the pumps. Not to a computer. AI Sol is working on a wireless control module for the AI Sol but its not available yet.
Some Info On that Here. AI Sol does have an optional
wireless controller. As for wireless between Radions and AI Sols. The Radion wins. It can talk to its neighbours where as the AI Sols are wired together (however hardly a major disadvantage)
Looks:
Radion is following the Apple look with their polished black glass. AI Sol is just a little further behind but still looking pretty stylish. AI Sol is about twice as thick as a radion. AI Sol is coming out with a new black model right away.
Mounting:
Radion is only a hanging style, where as AI Sol is hanging and also available with some pretty inexpensive rails and legs.
LEDs:
While they are both CREE, the Radion has 11 more than AI Sol. Plus the Radion has Cool White, Blue, Royal Blue, Red and Green where as AI Sol is just Cool White and Blue.
Well thats about all I can think of right now
They are both excellent LED fixtures.