Right now I'm slowly building a lighting kit and as of the moment, it does not include any fresnels. I figured that 650 fresnel would be a good investment to start with. I've narrowed down my first fresnel purchase to one of these two and basically what I wanted to know if one has any advantage over the other. I've read that the arri tends to "hot spot" in two places within the beam when it is fully spotted. Is this true? I apologize in advance if this question has been covered in this forum before. Thanks!