The Post Type Component is for controlling content visibility based on a page’s post type.
Here you select whether a page’s post type should be equal to or not equal to the selected post types.
B) Post Type
Here you select the post type.
What are Post Types?
Each page of your website has a particular post type. WordPress comes with several default post types, the most well known of these are Posts and Pages. Divi adds an additional post type called Projects. If you’re running the Woocommerce plugin you will have another post type called Products. The post types that will be available to you will depend upon what plugins you are running and your particular WordPress setup.