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https://www.youtube.com/watch?v=8KLTQECtzdA

The short of it is, the shareware version is all you need.
Better check out the review from LGR: https://www.youtube.com/watch?v=ythTarz4DyQ

The Shareware Version is just an older Version (v1.1).
The Retail Version was an Updated Version (v2.1) and there are some more differences then just the music, sound and the logo (Android -> Super Android).
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james5272: https://www.youtube.com/watch?v=8KLTQECtzdA

The short of it is, the shareware version is all you need.
I don't agree with that at all. If you like playing the same table with the same music over and over, sure, but each of the included tables have different interesting quirks/themes and music.