In some windings that can happen and efficiency will be 1-2% higher for windings but this depends more on total copper fill. Some winding combinations dictate the use of a bit more copper as the wire is thicker to achieve the desired amount of turns. At higher amperages there can also be a loss in the power bus which is often un-accounted for in people's simulations.
A good example of A LOOOOOTTT of copper fill is the big crystalytes of yore and QS hub motors.. this can indeed make more torque per amp.. but go too far with copper and you end up with excessive end turn losses and you lose efficiency that way.. and too little copper for a motor will have the eddy currents becoming a dominant source of loss.
But in this scenario there is no difference in the windings.. so okay, i am rambling. :lol:
We can compare the grin v1 and v2 motors here:
https://ebikes.ca/tools/simulator.h...20_GA&bopen=true&throt_b=97&grade_b=5&grade=5
The simulator says the v2 motor is 1-2% more efficient in pretty much every scenario you can roll it in.
It disagrees with Justin's statement on the webpage.
If you are correct then this is an interesting avenue for increasing efficiency on any motor.
I guess i would like to be more sure because replacing magnets is a pain in the ass job.. i also use 20" wheels on all my bikes so my rides are a lot more sensitive to losing power from eddy currents than say, a 26" wheel.
I feel like from middle to high loads, this makes sense.. but at low loads, you likely see the efficiency loss.. what's ideal for you depends on your vehicle design i suppose.