What is the difference between delegate and transfer

If your rule action is "Reassign", enter the user to whom you want to reassign the notifications. Select the field's search icon to display a list of values from which to choose. Then specify how you want to reassign the notifications.

"Delegate authority for responding to this notification" - Select this option if you want to give the new user authority to respond to the notification on your behalf, but you want to retain ownership of the notification yourself. For example, a manager might delegate all vacation
scheduling approvals to an assistant.

"Transfer ownership of this notification" - Select this option if you want to give the new user complete ownership of and responsibility for the notification. For example, use this option if you should not have received the notification and you want to send it to the correct recipient or to
another recipient for resolution. A transfer may have the effect of changing the approval hierarchy for the notification. For example, a manager might transfer a notification about a certain project to another manager who now owns that project.