A question from a 4x4 newbie:

I know the basic differences between 4WD and AWD (no center diff for 4WD, no lo gear for AWD) and that all of the off-road setups that I know of are 4WD.

I understand that the center diff is what makes AWD the superior setup for on-pavement situations (at least where turning is involved), but are there off-roading situations where NOT having a center diff is beneficial? Rock crawling, etc?

Or is it even possible to integrate a transfer case with a center diff?

Are there any vehicles that employ both 4WD and AWD?

Thanks for the info.