The main decisions when selecting a fluoride mouthwash seem to be: whether it should have alcohol or not, and what the flavor should be. Aside from these differences, I think most fluoride mouthwash products out there are about the same. I've tried a few brands and haven't seen a significant difference.
I personally use an alcohol-free one with cinnamon flavor right now. I love it. My wife though uses the classic mint with alcohol. She says she likes the burning, it makes her mouth feel cleaner. To each his/her own!