For my GV ('98), I've just checked the FSM.
The wheel hub rides on a bearing, the inner of which is mounted on the wheel spindle, which does not rotate. The spindle is hollow, and carries another, separate bearing inside, in which the driveshaft rotates. So the thing about the inner and outer rotating/not rotating does not apply. So I guess I could use freewheel hubs, to save the driveshaft bearings from wear, but I wonder whether there's enough benefit.
Could someone perhaps be more precise about exactly which parts are supposed to wear out/leak if the axles always rotate?
Just checked the Parts Catalogue, and, as Davyboy said, it's different for 01-on. The driveshaft bearing is exactly the same, but there is no separate hub bearing - it looks like the bearing is built into the hub. I don't see why that would make any difference to fitting freewheel units.