tensword, the clip quality on Youtube can vary greatly, however here are a handful of YouTube clips I found from just entering the product names:
CE200 - Harmonic Imaging:http://www.youtube.com/watch?v=fBZiWuFBPGg
ES6 - Harmonic Imaging, 88-key piano sampling:http://www.youtube.com/watch?v=DaEQ9KVy4hs
CN33 - Progressive Harmonic Imaging, 88-key piano sampling:http://www.youtube.com/watch?v=238HW0FEoB8
CA93 - Ultra Progressive Harmonic Imaging, 88-key piano sampling:http://www.youtube.com/watch?v=_AX8hodTWYQ
It's obviously not a like-for-like comparison, however I believe you should at least be able to hear the differences in tonal quality and expressiveness between the CE200 and CA93.
Of course, it's no substitute for sitting down at the instrument, playing it with your own hands, and listening with your own ears.
Ah, with Youtube it's also important to watch the clips at at least 480p resolution to ensure that stereo sound playback is enabled.
Could CE200 be used with Synthogy Ivory virtual source on computer?
Sure. This is actually quite a popular use for the CE200 as it also features line-in jacks so you could reroute the audio from your computer back into the instrument, making use of both its keyboard action and speaker system.