I have serious issues with your definition of AWD vs 4wd, but I will
digress to one point, your concept of awd is that all wheels get power
all the time? This being the case it would be similar to running a
locker on your front and rear axle that is fully locked at all times?
Heres my experience with AWD on BMW and Land Rover (Freelander is AWD)
the wheel with the least resistance will get all the power. ie, if you
are on stuck in snow, (high centered) you will get one wheel that will
spin. NOT all 4, put three wheels up against a large rock, then put one
wheel on ice. try to drive out, the only wheel that will turn is the
wheel on ice, it will occasionally slow and try to turn the other
wheels but there is too much resistance and they will not turn.
Here in lies the difference in 4wd and awd.
A true 4 wheel drive will give equal power to the front and rear axle,
also, a good 4wd will have a lock on the center, rear and front dif
which will all "all wheels being driven". This is 4wd. not awd.
Comparing the two is like comparing bimmer to a fiat....