I wound up buying this from Thwipster after they put it up for the third time. I currently have it swapped in for my ROTS ArtFX Vader until I decide which one I want to keep.
There are some improvements I like. The paint apps, suit texture, and general build quality are superior to the ROTS version. The light-up feature is nice, though it's annoying that you have to remove the helmet to flip the switch rather than just twist the lightsaber hilt like on Darth Maul. And I like that the display base is actually functional this time.
The problem, naturally, is the pose. What I'm finding is that it looks better depending on the viewing angle. I have the statue on the hutch above my desk along with my other Sith Lords. From below, it looks a little silly, but from across the room it looks more dynamic.
I can't decide which one I want to keep displayed permanently, but I may just keep both at this point. I doubt I'll get that much for the ROTS statue anyway.