if they're within $10 of each other, you might as well buy the centaur.
cartridge pads are better because you can do fine adjustments, like toe in and camber angle, to line up the pad to the surface of the rim better.
You can also buy after market cartridge brake pad holders with pads from koolstop which are about $15 for a pair or $30 for a set.
koolstop brake pads are $10/pair for campy style.
I see, that's good to know. But does this mean that the non-cartridge pads on the cheaper set won't allow you adjust the toe angle? The low-end shimano brakes I was looking at didn't have cartridge pads and you could still adjust the angle of the pad because of the way the mounting nut worked. I thought the campignolo ones were the same way.