I'm somewhat of a newbie and it seems strange to me that the Quickfire Rapid and Quickfire Pro would be made by two completely different companies.
I have a Quickfire Rapid and it's great, the quality is significantly better than my friend's Razer Blackwidow. I have to say I would have preferred brown switches over blue though, so maybe I'll try out the Pro someday.
I type harder than some people and prefer keys that are a bit stiffer. I can certainly understand that some quick and light touch-typers would be able to type faster using the reds, but I don't think they're for me. As for gaming, I'd be hitting the keys pretty hard so I don't think the switch type would matter for me in that regard.