Ratchet Goes Commando, Outdoes Jak?
Thanks to 1UP for its review of Ratchet & Clank: Going Commando for PlayStation 2, as the reviewer argues: "The original Ratchet & Clank was, for my money, the best platform game of this hardware generation when it came out", and goes on to rate the Insomniac-developed sequel just as highly. IGN PS2 is also impressed, and discusses the showdown with Ratchet's technology-sharing PS2 rival, Naughty Dog's Jak II, commenting: "If I had to pick just one platformer this year - and that's a tough call, considering the incredible game that Jak II is - it would be this one." Finally, GameSpot rates the title as "a great game", although caution that "...at times it feels like more of a mission pack than an entirely new game."
I think it's only fair to Naughty Dog to point out that R&C assimilated their engine, and there was no technology transfer in the other direction. One might imagine that getting the best PS2 engine, for free (in development terms), one could create a better game than the company who also had to develop the engine.