I just wanted to make a useless contribution and say that the #50 Anakin figure looks great strapped to the Deluxe Vader Medical Table. I only wish they would have bloodied him up a bit more, because he looks like he has a skin condition as opposed to lava burns.

And to make myself useful, in addition to what CHEWIE has already stated, a point by point articulation chart for these two figures:
AT-RT DRIVER:
-Ball jointed head
-Ball jointed shoulders
-Ball jointed elbows
-Traditional (cut) wrists
-Traditional (cut) waist
-Traditional (cut) hips
-Ball jointed knees
-Ball jointed ankles
-Second "battle damaged" chest plate
DELUXE VADER:
-Traditional head
-Traditional shoulders
-Swivel (removable) left elbow
-Traditional (cut) waist
-Traditional (cut) hips
-Swivel (removable) knees
The Deluxe Vader is best displayed on the table, though, as the arms being straight and possessed of rather spartan articulation makes him look kind of silly standing at attention, IMO.
