I still say Kurzweil has better acoustic sounds. Korg hasn't until recently put a decent stock piano on their Triton line. I remember when the first Triton was released all the complaints about the old dated Korg piano. My only issue with the Kurzweil is poly and what they mean by (true) 48 note poly. The Korg is nice too, but everyone has different needs. I've used the touch screen set up in live play from Korg (The old Trinity series), and what a nightmare to use in a live situation. You had to be really careful because you could easily select the wrong thing.
Again we all have our different taste. We can all give advice until we're blue in the face, but it falls down to the buyer to find and try these boards for themselves.
Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.