Well, I got a chance to see these two (C7000 and VT25) side by side yesterday and there is no comparisson - the Panasonic is clearly the better TV - at least in my opinion.
First, I had the TV guy make the settings as close to exactly the same on both TVs as possible and the Panasonic was the clear winner no matter what he did.
The Panasonic looked brighter, had better whites and better blacks and better color all the way around.
I also, for the first time, actually looked at the bezel of the Samsung C7000 closer and felt it - it looks and fees terribly cheap - the "textured" plastic (it felt like plastic, not sure what it is) was just way too unattractive - it cheapened the TV by a lot. If it would have had the same bezel as the C6500, then the TV would have looked very nice.
However, the huge font logo for SAMSUNG looked "out of place" in relation to the more subdued smaller font logo for the Panasonic.
All in all, everything about the Panasonic I liked better - the picture quality and the design - minus the fact that the Samsung is much thinner.
Again, this is just my opinion - but the trip made up any doubt I had in my mind.
My Panasonic P65VT25 is on order from a local dealer and should be here in a few weeks!
Now to find a wall mount that will hold this thing, lol.