The main difference between E-commerce and Marketplace depends on what are u selling. An E-Commerce, you are creating it from scratch, giving you the ability to do whatever you want and choosing the design, the shipping providers, selecting the products you want to highlight on the homepage, etc. but you’ll need to put in serious effort to ramp up traffic and drive sales. In Marketplace, you will able to have huge traffic and millions of visitors and a lot of competitors.