Thank you for interesting findings!
Do you mean "cadence"? The crank rpm?
Please take a tape measure and check the distance from the motor spindle (the center of the crankset) to the top of the saddle (center). This distance should be equal on both bikes. If that distance is different on your other e-bike then you know how much the seat post should be adjusted (give the technician this number).
It is 7.28 Wh/km, not a tragedy at all.
Bear in mind the battery 10% below reduces the assistance, and there is no assistance below 5% battery. I'd say 64 km (40 miles). Will you commute in Turbo or rather in a lower assistance mode?