A motor on each axle opens up all sorts of interesting possibilities for torque splitting. The SW engineers will be super busy for the next decade figuring it all out.
The truck will probably sense how much the trailer weighs and set the power levels accordingly or it'll just have settings you can choose in the screen. Diesels are pretty heavy, might not be much difference in the weight dept regarding payload, 2 of those axles and batteries up between the frame rails
