Blogger is a fine tuned service with very limited tools allowing you to perform only specific tasks on your website. The things you can do on your blogspot blog are limited, and there is no way you can extend them to meet a need.

WordPress is an open source software, so you can easily extend it to add new features. There are thousands of WordPress plugins allowing you to modify and extend the default feature set such as adding a store to your website, creating portfolio, etc.

When comparing WordPress vs Blogger for business websites, then WordPress is hands down the best long-term solution for any serious business owner.