Gary Explains explains by comparing several different boards, which architecture is the most efficient in terms of processing performance and power draw by benchmarking them and then normalising the results by using some mathematical wizzardry. The results are surprising.
@Geffers, as Head Tinkerer, this one's especially for you.
Nerd factor: reassuringly high.
@Geffers, as Head Tinkerer, this one's especially for you.

Nerd factor: reassuringly high.