I build the pc's myself, and often use sites like that to decide if it is worth the effort of upgrading.
Since I will eventually move BI5 to the Ryzen, I have already tested BI5 on it, and the cpu loading was way lower than the Piledriver - and that was in demo mode without the cpu assisting tweaks
That pc will then become the media server/ Homeseer 4/ NTP server etc as well, so I'm personally more interested in cpu loading than power usage.
Mmmm, new Ryzen cpu's... must resist...