I have two XR30 pros and they are fabulous lights. I'm sure you will find much success with the Red Sea lights as well. As far as what's better I think that's a matter of personal preference, but generally the XR30 is considered one of if not the best light out there.
That said, the AI blades are exceptionally good lights at far less cost so you can look at that option as well. I run two blade glows with my radions using the hybrid mount and I'm very impressed with them.