I have a remote sites spread all over the U.S. and they are all connected by VERY slow WAN links so I cannot just send big packages out to them. Therefore, I need to utilize content prestaging. 

I have large software update packages that I need to send out to my remote DPs. 

What I am having very difficult time understanding is the following:

• Automatically download content when packages are assigned to distribution points: Use this option when you have smaller packages where the scheduling and throttling settings provide enough control for content distribution. 

• Download only content changes to the distribution point: Use this option when you have an initial package that is possibly large, but you expect future updates to the content in the package to be generally smaller. For example, you might prestage Microsoft Office 2010 because the initial package size is over 700 MB and is too large to send over the network. However, content updates to this package might be less than 10 MB and are acceptable to distribute over the network. Another example might be driver packages where the initial package size is large, but incremental driver additions to the package might be small.

• Manually copy the content in this package to the distribution point: Use this option for when you have large packages, with content such as an operating system, and you never want to use the network to distribute the content to the distribution point. When you select this option, you must prestage the content on the distribution point.

What I am thinking is that I should go with the middle option, Download only content changes to the distribution point. 

Is this option similar to telling the DP to only update the Deltas which basically is like the default process on a standard DP that does not have content prestaging enabled?

Thank you all for your help.