The content sync via CTT tool overwrites the existing content folder in AEMaaCS server.
Consider a client has 400+ sites, which are being migrated in batches. It can have shared folders thus are actively edited both on AEM 6.4 and AEMaaCS. A regular sync from AEM 6.4 to AEMaaCS would be needed until all sites are migrated
CTT tool overwrites the content in AEMaaCS
CTT tool should be able to execute Delta migration
Environment Details (AEM version/service pack, any other specifics if applicable):