Alternatively, do a quick search for "decentralised vs federated" yourself. People here don't owe you basic explanations.

It's not that I am dumb and I am asking for help with info. I'm questioning the existence of this, there is no reliable source because these are not standard terms in any discipline.

It's not that you are not giving me source because your time is valuable and I'm dumb. It's because there is no source and these concepts don't have any standard rigorous definition.

https://www.google.com/search?q=decentralized+vs+federated

Google gives me trash. These are trash concepts, nothing written by academics or professionals or standard textbooks, or proceedings of magazines or publications.

Just blogs and cryptonerds (with different definitions).