There are indeed serious differences between platforms that might influence on your informative decision on using one or another. Bear in mind that I am referring to the developer hosted wordpress.com, not the self hosted wordpress.org. So, let’s review several factors on the platforms differences:
- Blog Import: In Blogger - limited availability to import and export only in the same blogging platform; in WoordPress - you can import from several other platformd, including from Blogger.
- Image Storage: In Blogger - 300 MB; in WordPress - 3 GB.
- Static Pages: In Blogger - not available; in WordPress - static pages can be listed in separate menus.
- Post by Email: In Blogger - accepted; in WordPress - not.
- Categories: In Blogger - not available; in WordPress - arranged with no problem.
- File Uploading: In Blogger - not available; in WordPress - files can be uploaded.
- Indexing Time: Here Blogger produces far better results, as due to the tight connections with Google, it can appear in the Search Engines very fast.
- Blog Monetization: WordPress has serious restrictions on the publishing ads, so if you plan to use AdSense, your preferences will probably lean more to the Blogger.
With Wordpress, it can get tricky. The default installation is not enough. You’ll need a couple of plugins and even a better theme to really maximize the Adsense potential. However, this seems to be getting easier and there’s even “Adsense revenue sharing” plugins around that allow you to share ad revenue with other contributors and writers for your blog.
Based on all information available, I would definitely recommend Blogger for all the beginners, while WordPress might be considered preferable for more experienced bloggers.