Dunno really - latest is probably better but to be honest, I mostly ride mine in manual mode as I always know when I need to change gear (oncoming traffic, junctions, road conditions etc.) better than any auto-choice gear that is effectively blind and only making decisions based upon throttle openning and rev count.
I have the original DCT and I've ridden the new 3S box....both do sometimes have a tendency to change at inappropriate times (leaning around a roundabout springs to mind).