@ selnor
The Xenon is comparitively handicapped due to slower higher latency shared system RAM, shared L2 cache by all 3 cores and the PS3 just has more processors than the Xenon has cores. Anyhow the emphasis of the 360 design is on the GPU.
Some technical details with regad to Kameo (IMO an awesome and great looking game):
"Cores 0 and 1 were ~80-99% utilized, and core 2 was typically 50% utilized"
You're welcome.