I have both. Still use Time machine for system backups and CCC for specific sync and backups, eg DEVONthink archive zips that are created automatically.
Basically Chronosync and CCC are the same. Chronosync I think has roots with developers who are/were world class rsync users. It is more “techy” than CCC, but CCC provides a user interface that may be simpler for some who dig user interfaces. CCC nomenclature has to be learned.
Basically they are the same, IMHO. as I said, i use both (and use Time Machine). So I am not entering the debate by declaring anything better than something else.
I think both still have trial versions so just experiment.