I shopped the Clavinova series before realizing I wanted an acoustic piano. This was in summer this year.
The two instruments you mention have really different purposes and target audiences. Are you a pianist? The CLP series is an electronic piano. Very nice sound in the 150 and 170. A few additional voices; I found the harpsichord pretty nice and useful for Baroque music. The recording feature can be nice, and the ability to use headphones is great.
The CVP's purpose is more a general music machine. It does not have the same quality of piano sound, but has many more voices, rhythms, accompaniments built in. It reminded me of the home "organs" that were fairly popular years ago when I was a kid. You can have a lot of fun with a CVP, but it's not really meant to be a true piano replacement.
Also remember you are comparing an upper end CLP to a bottom of the line CVP. The comparable CVP would be a higher model number.
For me, a returning (30 year gap) pianist, the CLP 150 or 170, would have been my choice. If having fun with built in accompaniments and voices is what you are looking for, look at the CVP line, but try to afford a higher model (better piano sound sample, higher powered amp, better speakers).
In the end, I bought a Charles Walter console, because I wanted a real piano. Hope this helps.
Wynne