Wow do we need this discussion again?
Basically the Xenon is three PowerPC cores taped together. The CELL is one PowerPC core and 6(+1) SPUs that are very powerful floating point computation units with some limitations regarding the worktypes they can do.
Or in other words the CELL is theoretically much more powerful than the XENON. But its easier for developers to max out the Xenon.
If developers have no clue about parallel execution both are identical.
If developers use threads but are not fit for CELL development, the XENON is better.
If developers know how to write tasks for the CELL, the CELL is much more powerful, depending on the computation type this may be hard though, because algorithms that heavily depend on branching are really bad on CELL.
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