Difference of schedule a reminder email and send it at a later date.

To me, it looks like the "Schedule a Reminder Email" appears to be a new feature.  Why do I say this? I would have utilized it before, but I am just now seeing this.  This is the feature I am talking about:

I am having difficulty with this feature.  I am trying to put the tag {emailAddress} into the to line but it does not save:

I suspect it does not accept the {emailAddress} because the form has not been submitted; but I am not sure --please help with this

Plus how does this differ from this function, which is an article from your help forum: 

How to Let Users Update Their Form Submissions at a Later Date

thanks

gml

Unfortunately, it is not possible to add form fields to the reminder email at the moment. If you are wondering what the reminder email is. This reminder email will send a reminder to your recipients that the form needs to be submitted/filled out on this date.

Example: I created a form, however, I do not want to be filled in today so I will set up a reminder email to send it to the specific date and time that I want to be filled it out with my reminder email recipients. It's like auto sender of the reminder to the recipients you want to send your form to.

You can check the guide here for more details: How to Set Reminder Emails for Your Forms.

Plus how does this differ from this function, which is an article from your help forum: How to Let Users Update Their Form Submissions at a Later Date 

When a user submits a form they will receive an email confirmation/copy of their submission data containing a link in the pre-filled form. From that link, they can update their entry, but it will be sent to the date you set to your autoresponder.

Autoresponder: How to Let Users Update Their Form Submissions at a Later Date.