SOLAR02 Configuration structure versus Configuration tab

SOLAR02 offers two approaches to implement configuration in solution manager project tools:

• maintain configuration structure (you find this in hierarchy tree on left-handside)

OR

• configuration TAB on Business Scenario, Business process and Business Process step levels

• configuration TAB on master data and organizational data nodes

What is the point having so many options?

Why would I use the Configuration structure option instead of configuration TABs? Examples of using Configuration structure?

Best practises???

br: Kim