Google has a rule that your blog should not contain PTC links because if you have that then your blog will not be eligible to earn from adsense. So I think that it lessens our earning potential. Anyway, no wonder lots of people use wordpress than blogspot, blogspot seems bland in appearance to me.
With Blogger, haven't you noticed that they have the same layout as compared to Wordpress that has more varied skins? I also don't like that Blogspot records how many blog entries that you have created, even if you deleted your blog already.
so it means that wordpress donot give .com domian at money.u have to buy from domain provider.
I have saw same wordpress webstites design like professional sites.is it easy to design wordpress blog.do they have some tools.
Again, if you host your site at wordpress.com you will get free subdomain like yoursite.wordpress.com but if you want to host your site elsewhere then you might need to buy a domain. Is it clear now? Regarding Wordpress, you can find many books and video tutorials online, which will help you set up your Wordpress blog.
If you are not doing the serious blogging then wordpress or blogger is good, otherwise get your own domain and make it serioous with your writing or other portfolio stuff. as a freelancer that is what i am doing for quite some time now.