Comparing AC to rF2 is a bit tricky. The way I see rF2 - lots of features but most of them far from being complete. The way I see AC - much less features, but much closer to being complete. So AC gives better impression at first glance, but then it cannot offer much more (at least not the tech demo, but that's to be expected of tech demos ). rF2 doesn't give such good impressions, but it's hard to deny it's growing potential, when you consider all features being worked on. For me, there's no clear winner and I enjoy both, but I'm not fully satisfied by either. And I don't think this comparison will start to look different anytime soon. AC will have more and more features added, while rF2 will have existing features more and more improved. Overall score will remain pretty much the same, I guess.