Added to Larry's list:

* Vocal volume control knob right up front similar to Tyros.

* Supertwist, high resolution, backlighted screen.

* Pre-amped auxiliary input.

* Higher wattage power supply.

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)