There is no denial to the fact that Wordpress is far more sophisticated, advanced and customizable than Blogger. Blogger and Wordpress both come for free but to use Wordpress, you need to spend money in buying domain and hosting. The all-free feature of Blogger makes it a holy grail though. You can have free blogs elsewhere too, like on Wordpress.com, Xanga etc. but they are less customizable than Blogger. Due to lack of plugin support and other customization options in Blogger, inserting Adsense in Blogger is a tad difficult than in Wordpress.