enlighten us
OP stated frequencies only for the GPU and citing those as performance factors... a GPU has other factors like shader count, shader clocks, bus width, VRAM speed, VRAM class, power constraints... there much more.
Also, I hope Fermi doesn't make it into Apple laptops, that would be such a pain to have.... 8-9 hrs would become 2-3 hrs and your legs will be burnt to a crisp.