Which is better the Valentine One or the Passport 9500i?

I am in the market for a radar detector. I heard a lot of good things about the Valentine, and I knew Passport was in the business for some time. Which one is better in your opinion and why? I live in Dubai and I have no idea what frequency or signal or whatever they use for their detectors. How can I find out? Also, dumb question but do these only detect guns or do they also detect the radars that are on the side of the road that take pictures? That’s what they use 99% in Dubai. They are going to start using guns. I just want to know if they will work.

Image by DonnaGrayson