The Clone Task copies data in the original captured format from one media to another. This is typically used to clone data from camera media to the Storage Module of the Vault.
The Generate Task is used to transcode data from the original captured format to a deliverable file type for use in post-production. This might be the original camera negative data, such as a .ari file for ARRIRAW or .rmf file for Canon Cinema RAW, or it might be a proxy file for editing such as ProRes .mov or DNxHD .mxf.