Nodejs has full support for the web APIs

[young aurora]

I really am just looking to learn a bit about it and how Web Request vs Node http Request differ / what determines what the request object looks like

I know NextJS is using the Web version.

[iron maple]

How different are they?
Very different interpretations of the http request. For more details I think Google will be able to give you much more info. But basically they are very different.

What determines
Edge runtime and Node.js route handlers: the Web API Request/Response

Pages router getServerSideProps and nodejs API routes: the old Node.js Request/Response