Compare two PDF files?

[steffi]

What's the best tool on the Mac to compare two PDF files to see their differences?

Alternatives to Adobe but interested in hearing how well Adobe Pro DC works at this.

 

[brandiop]

I will try Adobe Pro DC soon and also looking forward hearing good news about it! So far, Adobe works for me and I can easily compare two files with it. I would love to try other less popular apps too.