Both have their merits, but to me WOZ is light years ahead in tech and build, so an easy choice. Having been doing this since before the DMD became standard, I'm anxious for change and WOZ is pushing the envelope, while Metallica is in someways almost retro, inline drops etc. I think if theme was taken out of the equation and the 2 games were put side by side as fully playing whitewoods, it wouldn't even be close.