I have to agree with Halcro. FR 66s, at least in my system and my preference, works much better than Graham Phantom 2 supreme 12 inch. I had Graham for about a year and never could dialed it in to my liking with various cartridges that I have and I finally sold it. 3 days with FR and I am already very impressed. I never had a chance to compare FR 64s with Graham as I could not mount both on the same table.
My impression though is that may be Graham is still a touch faster, bass is very tight but also a bit more on the lean side. FR bass is bigger, richer, more solid which may make it sound a tad slower but still fast and very tuneful. Mid range and high is significantly better than Graham though. Graham has lots of detail, very clean but always sounded a bit sterile, a bit lean for my taste especially with Graham IC-70 phono cable which I tossed out very quickly. FR also throw the widest soundstage I ever heard in my system. I wish VTA is a bit easier to adjust. I really like the VTA on the fly like those on VPI, Reed or Graham arm. This way, it would a lot of fun to mount lots of cartridges on various headshells and swap them quickly. I think somebody made a VTA ring or something that works with FR 66s.
I much prefer Reed over Graham also (which does not mean that Graham is neccesarily bad, another friend with similar setup prefer Graham or Reed). May be I like the coloration brought on by wood arm wand and willing to give up a bit of bottom end authority and speed for rich,smooth, big midrange rather than the more neutral Graham but FR 66s seems to bring the best of both worlds.