Its quite good power wise but 2w is a fairly small difference (but still quite noticeable). Note the difference as a % of the whole will become smaller in real life because this test is without the screen.
it can be much higher, the peak power usage for the i3 is much higher, like running prime and furmark, and I think that can have a good effect on the design, it's probably cheaper to build around a system with the worst case scenario at 25w, not 40w
power efficiency here looks interesting.
Best to compare Kabini at its best (1600 single channel) to i3 at its best (dual channel), where you get 30 fps for Kabini and 40 fps for the i3. Not too bad.
Kabini would gain 15%, and the i3 would gain nothing?
i3 at its best = 1600 dual, tom used 1333 dual, so the i3 would also see a small increase, I would think, still both could the faster memory, and that's it, normally a memory bottleneck will benefit more the slower chip for a comparison.
but also I suppose Kabini is more starved for bandwidth considering it's only 64bit.
at least Tom's Hardware used the same software, memory and Hard Drive... a much better review than the other,