I think, it really depends upon your hard work. You know, how adsense calculate earning? It actually depends upon the traffic your blog is getting. High traffic means high earning. It actually not depends upon the blog-publishing service you use. You can use whether Blogger or WordPress but I suggest you to use Blogger or if, you are so serious about your upcoming blog, then use WordPress.org (paid) with a nice custom domain and then, give your full time to promote your blog, writing good unique content and other ways.
I have suggested WordPress.org to you because of its features and plugins like Akismet and yoast. These plugins really make a blog post SEO friendly. And I know, WordPress is little bit difficult for a newbie but you know, Practice makes a make perfect!
You can take example of two bloggers, e.g., Mohammad and Ankit Singla. They both are using different blog-publishing services (Mohammad-Blogger, Ankit-WordPress) and they both are earning from their blog.
Links That Can Help You:
Blogger or WordPress - Which one is the best? - MBT
7 Reasons why Never Migrate Blogger to WordPress
WordPess VS Blogger… Which one to choose? Which one is Best?│Blogger Help Forum
Good Luck For Your New Blog!