The efficiency differences are negligible. Eco/trail/auto/emtb+ are all very different assist levels on both bikes. If you truly set both bikes to same wattage, same assist %, the efficiency difference won’t even be a thought.
I can come on here and just say my Avinox bike did 40 miles and still had 40% battery and my Bosch could only get 20 miles. Do you see what I’m saying? Go try the motors yourself before spreading gospel about them because of what some dude said on here. You have no clue how they rode both bikes, the settings, the line choices, etc.
And again to stay on topic, I’d prefer Bosch keep their 750watt max and made changes in other ways. Smaller battery, smaller motor, lighter, refine tuning, etc. Peak power aside I still prefer avinox, but I’d turn back to Bosch immediately if they made the ride feel similar/better than avinox, lighter, smaller, etc even at 750w. Just chasing peak power isn’t going to put Bosch back on the map imo.