Google AdWords and Microsoft adCenter are both very useful tools when it comes to launching a PPC campaign. While there are some differences between the two, they can be equally efficient at getting your PPC campaign exposure.
Google definitely has a larger market share than adCenter. Google has been in the internet advertising business for a long time, and they have more experience. Quite frankly, they’re rather good at what they do. AdWords has been reaching millions of users daily for a considerable period of time. People respect Google, and subsequently their paid advertisements, as a trusted provider of information. So, your AdWords campaign gains that respect.