The biggest difference between Gantter for Google Drive or G Suite and Gantter Cloud is where the files are stored. For Google editions, the files are stored in your Google Drive or Team Drive, whereas with Gantter Cloud, the files are stored in our Google powered secure Gantter Cloud File Store.

Can I switch editions from one to another? Or use either?
Yes, with the purchase of any Gantter subscription, you will be able to log in with that email address in either the Gantter Cloud, Google Drive, and/or G Suite editions.