I think it is the latest talk because that's what everyone is going to. So when you have the best drivers switching to VVT cars, it appears that the VVT car is the better car to have, because they are winning (even though they were already winning).
I think the VVT is more forgiving so it would be better for someone who makes more mistakes. But at the pointy end of the field, there are less mistakes, so I would say all the cars are pretty equal over the entire lap. VVT pulls me a little off the corner and I make up the time down the straight with my 99.