Casio CZ/ VZ/ FZ - Pro Series

Okay I understand the concept of sampling.  What I am after here is 
what is everyone's thoughts and comments on the synthesizer aspect of 
the VZ line of synths.  What does it really sound like?  

For instance, let's say I have a piano sample.  Now I run it through 
the VZ-1, 10m, 20m and what happens?  Does it sound like a "CZ-ish" 
piano.  What does the synth engine on the VZ do?  Can you describe the 
sound.  Is it something completly different then the CZ sound?

Look forward to hearing from you VZ users....