When requesting a pull from Salesforce, unmanaged code retrieval will get only the files that have changed. On managed packages TWS pulls everything, every time. And on the screen that is shown at the end, TWS shows a a long list of the package name(s) repeated over and over, instead of a list of what files it pulls. For unmanaged code, this screen shows the list of the files that were downloaded from the org.
I have attached screenshots