Ron,
Here's a good article:
Edmunds article on AWD vs 4WDIt essentially boils down to your anticipated driving needs:
If you want good traction going to get groceries in the snow -- AWD suffices.
If you're going off road regularly -- 4WD
BTW/FWIW ... I have both kinds of vehicles -- an AWD and a true 4WD. I'd never go off road with the AWD car ... except maybe into a hayfield or something

Its good to stay out of the ditch running for beer in a snow storm ...

You're not going to conquer your world in an AWD ...
JM