Just as a T4 is substantially similar to a T3, it is unsurprising that the PA3 be substantially similar to the PA2.

What I haven't heard, at this point, is by how much they have expanded the DNC sounds. Hopefully, Korg have finally leveraged a good OS feature (but brought out before the samples to use it were made) into a fully fleshed out competitor to SA2. Mind you, I am a little concerned, as I would have thought this tidbit would get a LOT more fanfare if true.