They are one and the same. If you knew where to look, they provided means.

Tools are agnostic to their use. Tools do not have a preference how they are used. Hammers that are used are agnostic to if they are hammering a nail into a wall or caving in a skull. Yuzu would work exactly the same if you dumped your own carts. Same for emulators for Genesis and Atari 2600 and PlayStation.

What’s wrong with Twitter? You could also just google this and find the information yourself, don’t know why I have to provide what should be common knowledge on this subject.

If you make a claim, you need to provide the evidence. That's how these things work. You say a claim, you give us the proof. And I can say on Twitter "Yuzu was 100000% legal and Nintendo actually is the real illegal operation". Now that's a valid source too, right?

They were not a legal emulator, full stop, sorry.

https://www.eff.org/issues/coders/reverse-engineering-faq

Sorry but that biggest technology legal experts and defenders of the little guys who get sued by the big companies you polish the boots with your tongue strongly prove you wrong.