All i was saying is the 4850 is technically a desktop based card, just because of the same chip. The 9600 was a comparison showing the differences between the mobile and desktop counterpart and how it normally is; the 4850 does NOT have any differences, besides the underclocked part which is why its a bit different.
Then if Apple uses a mobility 5850 in their next iMacs, we can call it an underclocked desktop 5770 right?