Extremely interesting point, what is the brand of your bike using the bosch?This should be of interest, here's some Strava stats comparing the development Juicy bike with the Roller motor system compared to my old classic Bosch bike.
I did my first run on the Juicy,and second run back up on my bike, despite being tired from the first run I was 2:24 faster on my bike, I didn't find the Juicy bike enjoyable to ride in the way my bike is.
https://www.strava.com/activities/565062132
sent via huawei P9