You can compare them on Optics Planet. I just looked at the JP. It has a 65 MOA Circle, with a 1 MOA dot in the center. Thats a deal breaker for me. If it was just a 1 MOA dot, I would buy right now. The Romeo Zero has a 3MOA Dot, the Shield has a 4MOA, do not want to go any bigger than 4, just...