The document widget can be added multiple times in your active widget list. Hence in each widget you can choose the documents that should be displayed, so that there is no repetition.
In each widget, manually select the documents to be displayed. Ensure that the checkbox of Show Topmost is unselected and remember to Save the changes.
The article on Organise your documents in the library explains in detail how to add, delete and re-arrange your project documents.
Below is a screenshot of how the 2 widgets above will be displayed to the participants.
The link to the documents will open each of the documents directly. The 'more' link will open the project document library for both.