Unlike evince, you can see the outline of the documents. There's also more information about the file. You can copy text (with the Ctrl key), but you can't export to text (for that, use the command djvutxt from the djvulibre-bin package).
good Viewer djview
Great to convert djvu into pdf with a single click ("export as"). The result is flawless.
Good viewer but can't select and save the OCR'd text.