TTG, SA2 is quite a bit more than velocity and legato switching... It also includes rules for intervalic switching, and also physical switches too (not sure, but that might include footswitches, too).

In all fairness, that's about the same as many VSTi's with articulation control..

The reason why I chose SA over audio loops or Korg's DNC is that it is FAR more mature than those technologies currently are. Ketron need better technology to allow the audio loops to be more than the incomplete system they are now, and Korg have yet to leverage the DNC capabilities with sounds and samples designed for it. Technological capability is only as good as its' implementation, and the IDEA of Ketron's audio loops is fabulous, but its' implementation leaves a LOT to be desired, so far...