I bought a Shimano based EP8 Merida E160 500 recently.
Beautiful bike.
The charger on the Shimano is 42V 1.8A while the Bosch is 36V with 4A, a huge difference. The Bosch was on my hardtail Scott eAspect 720.
It is very noticeable, the Shimano takes a long time to charge almost twice as long...