Microsoft added a new tab "PC vs Mac" on the Windows 7 Compare section. It covers few comparisons on

Having Fun - Macs might spoil your fun.

Simplicity - Macs can take time to learn.

Working Hard - Macs don't work as well at work or at school.

Sharing - Macs don't like to share.

Compatibility - Macs might not like your PC stuff.

Choice -Macs don't let you choose.

You can read more here

Here you can see the MAC website which says the advantages of MAC over PC

Read more on the Advantages of MAC over PC here

[Via  Microsoft Watch]