When comparing PDF Bob vs Atril, the Slant community recommends Atril for most people. In the question“What are the best PDF viewers for UNIX-like systems?” Atril is ranked 2nd while PDF Bob is ranked 16th. The most important reason people chose Atril is:
It is a straight port of the GNOME2 Evince to GTK3 without sacrificing its UI like Evince 3 did. It also has all the cool stuff that professional apps need, like: Menubars, editable Toolbars, Menus with Icons, Menus with keyboard shortcuts.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports addition of comments to PDF in "Annotate" mode
Pro Supports addition of the images to PDF in "Edit" mode
Pro Support password protection of the edited files
Pro Supports the addition of rectangle, circle, line and arrow in both Edit and Annotate modes
Pro Stores the files online if you have an account
Pro Can export files in PDF, DOC, DOCX, JPG and PNG formats
Pro No GNOME3
It is a straight port of the GNOME2 Evince to GTK3 without sacrificing its UI like Evince 3 did. It also has all the cool stuff that professional apps need, like: Menubars, editable Toolbars, Menus with Icons, Menus with keyboard shortcuts.
Pro Great Evince fork
It has been forked when Evince was still good.
Cons
Con No "Sign PDF" tool
Con Disappointing search
In comparison with its origin, Evince, the search results in Atril is disappointing. You can search, but only locates your search term per page, the one you're located on. Want to find it elsewhere? Search all pages one by one, page by page. Hence, I personally, working/ searching in large pdfs, therefore prefer Evince, which does give you the search result for the whole document. Apart from this, Atril seems a great piece of (fork) work.
Con Some GTK dependecy
It needs GTK+ and its dependencies.