Registration/Subscribtion Plugin

I’m new to wordpress and trying to figure out all the features that it has which seem to be endless. I have a new blog that I set-up and I’m looking to have an option so viewers of the blog can register in order to get email updates when I post a new article. I’ve seen a few different subscribe plugins and some registration plugins. What’s the difference between a registered user and a subscribed user?

I’d like to be able to view a list of everyone who is subscribed to the blog as well as have the user register from the blog and not go to the default registration page that comes with WP. I’d love some recommendations and guidence of plugins they use and have had success with.

Thanks!!!