The E7000 puts out slightly less torque, but you are not likely to even notice. As far as reliability, the motor was new for the 2019 bike year, so it has only been in the field for 9-10 months. No huge issues AFAIK, but with that said, a few people have had issues with E8000 as well, so nothing is perfect. A friend of mine rented a Pivot Shuttle about a month ago and it mysteriously shut down and displayed error codes in the middle of a climb twice in the five hours he rode it. The dealer said others had reported the same issues, but just like a modern car, if the motor isn't malfunctioning while the mechanic has it in their hands, there is not much they can do.