Decentralized exchange more easy but not secure. Centralized exchange always secure if you on two step verification. I don't like decentralized exchange because I need to share my private wallet address where my others token are in the risk.
Using decentralized exchange sometime feels ridiculous, when we have to enter our private key when starting to use it. It's really not recommended, if there is an option to sell tokens in centralized exchange, I think it's better to sell them there unless it's a new exchanges.