It's depends on your choice and taste
Read the below mentioned topic for WordPress and it's characteristics.
Unlike Blogger is powered by Google, no doubt it is good but friendly speaking not better than WordPress.
Blogger have limited features like users tracking, limited widgets, limited source file access and so on.
Google have numerous online platforms in which on of them is Blogger and WordPress is only a platform which are focusing their attention only on it.
In Blogger their are no cache, Seo or further featured plugin, means Blogger has threshold whereas in WordPress has no boundaries.
Choice is yours!