Blogger, wordpress, or other, as free blog hosting?

I have both a wordpress and several Blogger blogs. And I wonder what is the best (even other ones, if you want).
In particular I don’t find the way to show (using a url, such as /?cat=something) wordpress post of a given category.
Blogger seem more flexible, and from a SEO point of view better…
I don’t konw…


Found: the url is