How does the server differentiate between requests made with Python and requests made with the Browser?

Question

Python

Interested in how much the request made using Python (requests or httpx) differs from the request coming from any other browser? Are there any differences?
In theory, this is a set of the same bits.
How the server understands that the client that sends the request does not have a JS handler.

In advance, thank you all for your response.

Answer 1

you can also check if you later requested some other URL, on the initiative of JS.
Did the connection close, or is it HTTP/2.

Answer 2

obviously from the headlines