Hmm, the six bonus levels are actually just side missions you unlock by find gate keys in the Gaia Gate temples on each continent. IMO, I don't they make up for the fact that Empire City and Mazuri have been cut out of the Wii version, especially since most of the day time levels in the 360/PS3 version have two or more acts.
So if you had a choice (I do), with these bonus levels in mind, would you stick with the Wii version, or go with the XBOX 360 version of the game?
I played both. I like 360 version more. I would go with the XBOX 360 version. Here is the first act of Empire City for you.
Third member of the Sonic Support Squad. Member of the Fierce Fox Force.