Thanks!

As for ToD vs. SH-AWD, I guess I would not compare the two systems so directly. ToD is an appropriate system for enhancing traction in off-road vehicles like the VX and Trooper, while the SH-AWD system is appropriate for enhancing cornering and handling in a sports sedan, while at the same time giving it a measure of all-wheel-drive traction enhancement, much like Audi's Quattro system.

I don't think any AWD system is a suitable replacement for true 4WD on a off-roading truck. They are nice enhancements to traditional non-truck drivetrains, and may help you get home in the snow, but I don't think Acura or Audi or even Subaru intend or market their AWD systems to be substitutes for true 4WD.