Old thread, but might as well throw in my input. I replaced a broken 40lb Endura Max with a 45lb R3 (non-variable) last year. That being said, my power consumption almost doubled in the exact situations on the same boat. The detent on the extendable handle also came apart on the first outing, allowing the handle to freely slide in and out while moving. You can hear it rattling inside the handle…
The adjust-ability on the Endura Max is awesome, I could dial in my speeds perfectly. On the R3, I find myself adjusting power almost constantly to get the proper speeds. I doubt the power consumption is due to the 5lb increase in power, but I guess it could be possible…