This whole ITO vs ITOless thing is disconcerting. I had a 59D7000 that was an October 2011 build first, but I upgraded to the 64 and ended up with a July 2011 build.
I noticed immediately the blacks seemed blacker on the 64 compared to the 59, but I attributed it to the panel size and differences there. I was not aware they changed the RBF. I think the 64 has worse uniformity and more line bleed than the 59, but I can't confidently say I'm just more OCD about the 64.