Yes wordpress you can customize your blog anyway possible and you really own your site and have complete control of looks and your content. Their are many tools for SEO like someone said about the auto social poster helps you index faster and you gain alot of good backlinks and also you can setup ping services to help boost your visibility.
Last June, I've used Blogger to set up my tech blog because I don't have any cash to pay for my domain and web hosting fees. However, I find that Blogger blogs aren't that professional as compared to .com. Therefore, in February this year, I've saved up enough money to host my blog and set up a Wordpress.org account. As a 15-year-old blogger, I would say that I'm pretty impressed with the Wordpress platform. Besides that, I can even upload really cool plug-ins. Of course, switching from Blogger to Wordpress will lose visitors especially those coming in from search engines but I would suggest you to make the switch if you really want your blog to be on a professional status.