wbmw, it is interesting that AMD gets better output transmit power with lower transmit power consumption. AMD appears to be more efficient. If you note the difference in units of measurement, you'll realize that what you had listed as an advantage for Centrino is actually a substantial advantage for AMD. Higher transmit output power with lower transmit power consumption is a very good thing. So, Centrino gets the nod in idle power consumption, and just ekes out a win in the sleep power consumption, AMD gets the rest.
Paul