CVG interviewed Valve writer Chet Faliszek, who said the two games would perform exactly the same. "If you bought the PS3 and Xbox 360 versions and put them side by side you can see they're identical games," he said. "The actual content is the same too, across all platforms."
He said the PS3 will see more frequent updates, along with the previously announced cross-platform play and chat, since the team doesn't have to go through a gatekeeper to do so. The game content and performance itself, however, should reach platform parity.