I think the primary advantage, RED has always has, has always been int he R3D. Nobody, and I say this again, NOBODY, has anything like it. Competitors can make cameras that can win in certain areas, like native dynamic range, have giant pixels but low res to gain intense low light abilities. Or super sample to death to gain everything. But R3D is the #1 reason (along with many others) for going with RED. It's as simple as a DSLR raw file brought into photoshop, and now with the new compression ratios, it also has all the information of your high end uncompressed recorders.
I'm probably gonna love the images out of the F65, just as I love the images out of RED too. but their only 4k recording solution is a bulky SR deck, that will cost half the price of the camera, and their SR storage (i call them the Hershey bars) will be several times more expensive than any SSD RED puts out when it reaches to their capacities (1 TB)
But i think all this leads back to another post Jim wrote. The cameras are here now, at every price point, there's no excuse of you not getting Hollywood quality images other than you not performing your craft correctly. Meaning back to the basic, as it always should have been. Lighting, story, acting, editing, the whole 9 yards.