Watching the video, the Braiins is wired ethernet, but the energy efficiency is waaay worse than the BitAxe. 

It is showing on the video at 37 W/TH, this compares to what I see on the BitAxe at around 24W/TH.

The Braiins seems to run at 1.5 X the speed of the BitAxe, but requires about 3 times the power.