Related question.

Visually, what is the difference between a fully loaded 4.4 vs 4.8? From what I can see, looks like:

Exhaust pipes are dual round on 4.4 and rectangular on 4.8,
Brakes (rotors and calipers) are larger on 4.8 than 4.8
Badging
Stance, due to different tire/wheel size (but I assume in aftermarket you can find 20x9.5, 275-40F and 20x10, 315-35R to fit the 4.4),

What else?