The other day, out of curiosity, I repeated the same route I'd taken during the Gen. 4 test with my Gen. 3 to evaluate the differences, especially in terms of battery life. It was interesting because I noticed that the Gen. 3 consumes slightly less battery life with a setting as close as possible to the one I usually use. On the Gen. 3, I mainly use ECO mode set to 25/100, while for more challenging routes I use TRAIL 45/100. On the Gen. 4, instead of ECO, I used Dynamic Microtune at 10/100 and, instead of TRAIL, 50/100. It should also be said that my ebike's battery isn't as fresh and is approaching 200 charge cycles, so it's more of a 600 Wh than a 700 Wh... In any case, I felt like I was struggling less with the new one, and even though I chose a fairly low level of assistance, it still seemed high for my taste. Another feeling that stuck with me was that I had more fun with the new one, but it could simply be a placebo effect; I'll have to try it again. In conclusion, at least in terms of fuel consumption, the Gen. 4 doesn't seem to have made any great strides forward, and more generally, the Gen. 3 is still an excellent ebike with which you can do everything you can with the latest model.