SAP CRM Question:

Answer #1
Simple words ECC is R/3 and you know what CRM is

Answer #2
In R/3, Purely Sales activities will be taken place and also HR activities and Financial activities will be taken place. In CRM, Pre sales, Sales and post sales will be taken place such as Marketing, Sales and Service. In CRM, customers can communicate with sales agents through various channels to order products or to complain, which is called Interaction Center Webclient. Basically, CRM is implemented to be in touch with the customers all the time.