Emulator

There it says " The Xenon CPU seems like a good chip that fits in with Microsoft's programming preferences more PC-like design as it were, more suited for quick and slick creation of developer tools, and more suited to the way most programmers think of CPUs."
So that's why it might be easier

That's not the only part; all pieces on the 360 are weaker than on the PS3 except for some that are similar (if not equal) on the PS3. In fact, the 360 is more similar to a PC that the PS3. Sony designed (Or order to) almost pieces on the PS3; Microsoft just bought existing pieces.

PS3 is a powerful console; 360 is just a computer designed only to run games.