which to choose - iCloud or iCloud drive?
I see that emails, pages and other services are included as options for 'apps using iCloud' and 'apps syncing to iCloud drive'.
What is the difference and purpose of each?
MacBook Air, macOS 14.2
For all intents and purposes, they are the same. iCloud is the name of the service. iCloud Drive generally refers to the files that you sync to iCloud. iCloud also stores backup files, synced files inaccessible to you, and has separate storage folders for some apps