NestJS is a framework built on top of NodeJS. Thus, comparing advantages between NodeJS and NestJS may not be an apples-to-apples comparison. NodeJS is a JavaScript runtime environment that allows developers to execute JavaScript code outside of a web browser. NestJS, on the other hand, is a framework for building NodeJS-based applications.

That being said, NestJS offers several advantages over NodeJS as it provides a structure for building NodeJS applications in a scalable and maintainable way. NestJS uses a modular architecture that enables developers to build server-side applications with a modular structure, allowing teams to work on different modules without interfering with each other. NestJS provides multiple features like dependency injection, support for various data stores, GraphQL support, and more.

So, to sum up, NodeJS enables one to build server-side applications using JavaScript while NestJS offers a standardized and scalable structure to build these applications.