Yes, it is functionally different. Because of man, -h/--help,tldr, documentation, consistency, etc.
The terminal is a consistent and predictable tool that you are given every needed resource to able to learn and use. To find out what a command does is easy and you don't need internet to do it. Plus, the terminal is way more versatile and extensible.
The entire point of the terminal is to empower the user and give a consistent interference to manipulate low-level and high-level settings, features and applications. While the entire point of the registry is to limit & obscure the accessibly of options Microsoft doesn't want you to be able to touch or know about. Nor is it even consistent for that matter, with stuff shuffling around, resetting and being removed during updates. My post is a prime example, they don't want you to be able to disable Bing search because they make money from it, exactly the same reason they actively try preventing you from removing edge.