Just got a look at a new Claas with he new rwa. It looked like a mechanical drive with a driveline running through the axle. I'm not sure if it has a separate transmission for the rear end.
Sorry, not a mechanical drive.

The hydraulic motor is hidden in front at the middle of the axle now driving the wheels through a mechanical differential unit instead of a motor on each wheel.
It does simplify hydraulic plumbing but I doubt there would be much of an efficiency difference.
As Jayne would say, 6 and 1/2.
6 of one, 1/2 a dozen of the other.
I'm not sure Claas employs the traction control system the European units use or not.
