Deactivation is a temporary break. Your personal data is linked with the platform. It will not be visible to anyone outside. You can reactivate anytime in future, whenever you want. All the data will be restored on reactivation.
Deletion is a permanent removal of your personal data from the platform. Upon successful deletion of the account, your data will be deleted and it will not be accessible. Your coins will also expire upon deletion. However some data of yours will still be retained which are required as per government regulations such as your purchase data, coin transaction data, earnings data, etc.