There are a lot, and I mean a lot, of very subtle differences in V3 compared to V2. Most people will not see them at first. But then there are the obvious changes. New start menu with uniformed glass. New flat glass taskbar. New start orb and most of all the more transparent glass all around. There is also a new sidebar style to go with the theme.There is also the Metallic silver basic theme for people who cant use Aero as seen in V2.

For the extra transpancy effect you will also need to adjust 1 thing.

1. Right click on your desktop and click 'Personalize'
2. Open Appearance settings
3. Go to 'windows colour and appearance'
4. Click on 'Default' for your glass effect
5. Now move the slider to the far left for the clearest glass
5. Apply