Antec is clearly dedicated to the Flux setup as all of their focus products now include it and are clearly named as such. Thus, the DF700 Flux is no different. That said, Antec continues to tweak the Flux functionality with each release. This is most apparent when looking at how these fans are controlled. While the DF600 Flux was the first to offer this set of fans at that great $70 price point, we had critiqued the fact that the hub does not allow for any smarts and ran the fans at full tilt. With the DF700 Flux, which clocks in at a just ever so slightly higher $75, you do get a proper, fully fledged high-quality fan controller, so the experience you get from the Flux setup is quiet enough for you to actually enjoy that your affordable case came with a whooping five fans out of the box, even if the Flux setup is not going to make a huge dent in your system's temperatures.
Besides that, as the frame of the DF700 Flux is the same, its improvements mostly are in the case design, which does away with acrylic as a material. Instead, the front is now constructed out of metal mesh of a pretty cool visual design to boot, which should make the DF700 Flux a more appealing choice than the DF600 Flux in terms of looks.
All these improvements and design choices make the Antec DF700 Flux a nice, affordable, and functional case, and you will be hard pressed to find this out-of-the-box setup with many other cases in this price segment.