Suite Commerce vs. Site Builder

We use Suite Commerce to manage our website. But we still have data populated in Site Builder. Are the two mutually exclusive? I'm new to NetSuite BTW, just started this position and am learning on the job. My company has everything set up with their e-commerce website on NetSuite. I'm trying to make sense of everything, especially from a Marketing Automation perspective.

This question was prompted by looking into an article on Suite Answers: "Automatically Assign a Lead Source to Shoppers who Register on the Web Store" Answer Id: 23016

Joe B.