It seems to me that the spring bar ones are just trying to "look" like sewn-in buckles. The screw type are pretty obvious. That said, it's pretty easy to spot the spring bar types anyway, so I don't think anyone is being fooled.
I'd say that you should just go for the ones that look the best to your eye (and you the ones you can easily get your hands on, of course). I mean, I'd love to have all GPF-Mod Dep buckles, but they are impossible to find and very expensive. Since nobody seems to want to rep them, you are stuck with the other alternatives like pre-v and gpf screw-in and spring bar along with a few sewn-in options.