When comparing PDF Expert vs pdf-xchange Editor, the Slant community recommends pdf-xchange Editor for most people. In the question“What is the best software to annotate a PDF?” pdf-xchange Editor is ranked 5th while PDF Expert is ranked 9th. The most important reason people chose pdf-xchange Editor is:
You can use Playonlinux to install the Windows exe file with 32-bit wine.
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Pros
Pro Fast and smooth
It is a software focused on consumption and not in editing PDF (yes, you can accentuate highlight, draw shapes and sign). They managed to build a nice looking efficient product in which they propose to do.
Pro A complete set of shapes with properties control as well as a calibrated measuring/dimensioning tool
You can use Playonlinux to install the Windows exe file with 32-bit wine.
Pro Provides proper annotation support
Unlike xournal which only adds a graphical layer on top.
Cons
Con Expensive for what it offers
It is an item that improves aspects of PDF reading (which is free: Preview) but lacks professional features that other similar software has.
Con Missing settings options
Lacks basic settings like anti aliasing level.
Con Closed source
Execution under Linux only via wine. Sandboxing recommended.