Is succession and separatism the same?

So there was some thread on twitter dealing with Puerto Rico and it’s relationship with the US, the OP was saying Puerto Rico should succeed from the U.S. and was referencing some works by Lenin and Marx to support their position. A Bernie supporter accused the OP of separatism and claiming they were no different than Southern Confederates and so on. (Even though that’s a shit comparison, they technically succeeded?) OP was mentioned that separatism and succession aren’t the same thing but the argument turned into a bunch of attacks and OP never really explained this. (The entire thread went way off topic very fast so I don’t even know if this is a legitimate question) so it got me wondering, is there actually a difference and if so, how?Would it be that succession is more political, in the sense that the group succeeding has the intent of having their own independent state whereas separatism would be where a certain group of people live in their own communities and don’t really interact with the state? (Best example I can think of would be Amish communities in the US where they don’t have their own state but yet they are separated from the state and enjoy a higher degree of autonomy) via /r/communism https://ift.tt/3c9t0P8