Unless he uses the Bkool for power in Zwift - we’ll never know. Would be nice if both powersource and trainer info was available on ZwiftPower.
I must have a play around later to see if I can get the power data from both the Bkool and the Assiomas for the same ride. I guess if I use the Bkool paired to Zwift and then the assioma pedals to my garmin I can get both .FIT files and then put them together in excel. DC Rainmaker has a tool but it costs a few $$ to run.
I agree that you have to take zwift with a pinch of salt and use it to improve your own performance as theres so many ways to deliberately or accidentally cheat (weight, height, calibration, motor doping). I have joined a group in Facebook called Zwiftransparency where you can upload a video of your weight and height just to prove at least that side is right. I've updated my ZT passport with a few IRL strava sectors that some of you might have ridden on...links might not work but you can get them from my ZT passport in the signature if you recognise the sector. I see a few of you have done some of these climbs.

Mallorca, Spain - Puig Major climb from Soller - “Puig Major 10km Climb” - 6.3 miles @ 6% - 00:37:12 - http://bit.ly/2GKsbOJ
Mallorca, Spain - Sa Calobra to Coll dels Reis - “Sa Calobra to Coll dels Reis (official)” - 5.9 miles @ 7% - 00:36:43 - http://bit.ly/2LaC7Xq
Mallorca, Spain - Pollenca to Formentor view point - “Cap Formentor to 1st view point” - 2.0 miles @ 6% - 00:10:02 - http://bit.ly/2W8lFbi
Tenerife, Spain - Los Christianos to Teide - “Teide” - 20.3 miles @ 6% 2:35:35 - http://bit.ly/2V8MY92
Calpe Region, Spain - Parcent to Coll de Rates - “Coll de Rates official” - 3.7 miles @ 5% - 00:22:38- http://bit.ly/2PyZ84Z