I haven't read some of this thread cause i am lazy today, but as far as those laptops go i would say the AMD. Reason being athlon runs at lower core speed but is equvalent pentium chips that run 30% faster core speed. Reason is the architechture, the atlons do more work per cycle than the pentium thus able to run at a lower core speed.
Lower core speed means less heat, lower Vcore. Which= less problems and longer battery life. The apple i don't know much about so can't say anything about that.