For what it's worth, I switched from the Shimano chain to the Campy based on some previous comments.
First off, the Campy chain felt much smoother in my hands. Once installed, it doesn't try to shift up. I still get a little noisy in the small small cross chain but it works a lot better.
I figured if the chain matched the speeds, brand wouldn't matter. I guess I was wrong.
Good thing those 10 speed chains are usually on sale.