The VR30's transmissions have a much larger torque converter and more clutches. To my knowledge, no one's done it on the 370Z, though a couple have on the G37.
It seems to shift a little faster as well, though if a DCT is a 10, a ZF8 is a 9, and the Jatco 7AT is a 6, it'd be more like a 7 on speed and responsiveness.
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