ROK had a much softer, lower powered response. Was more Prestige like, but I found it lower powered than most Prestige Mids at the time. That being said, it was an unbelievable control stick, just needed to be strung low to juice it up a bit.
For me the Blade 93 had more pop and feels more solid.
Actually, thinking back, I was hitting the ROK with multis, and hit the Blade 93 with polys, so that just reminds me even more how low-powered the ROK was.