I’m sorry that I probably can’t give you a meaningful answer. But I have a Mondraker Neat with a 360Whr battery and a 160whr range extender. I believe the Neat has a 50Nm TQ motor. I recently had an outing in the Alps near Morgins with a friend who was on a full fat LaPierre.
i think the biggest complication in getting a simple answer will be how much support you want. The only e-bike I’ve ever had is the Neat. I tend to ride in the lowest mode, or the middle mode. I hardly ever use the higher mode. But when I swapped bikes with my friend, my highest mode was sort of equivalent to his mode 2 – out of his 4 modes available. And I’ve found that I’m always getting passed by e-bikes on the trails who are clearly riding their full fat bikes with higher levels of support than I use.
so my point is this – if you re used to full fat, and want reasonably high levels of support, then this will dramatically affect your range imo. On the other hand, if you can reset you expectations based on the lightweight e-bike experience, then I think your range should be pretty good.
on my Neat, if I climb 600m and ride for a couple of hours in the Alps, I tend to use about 50% of the internal battery.