Know the market.
"I often get asked how Acrobat 3D compares to the various view and markup tools on the market like Autodesk’s DWF Viewer, Solidworks’ eDrawings, Siemen’s JT2Go and VisView."
Autodesk’s DWF Viewer isn't even on the market. Nowadays it's Autodesk Design Review.
Other than that if you want to combine most any file into a PDF document Acrobat might be the best choice. The extensive API is also a big plus.
"While the main area of overlap between Acrobat 3D and view and markup tools lies in their ability to distribute 3D geometry and 2D drawings while leveraging a low/no cost viewer, it is Acrobat 3D’s ability to convert 3D content as well as combine it with other project information to create a single compound PDF document, complete with security options like encryption, digital certificates and digital signatures that sets Acrobat 3D in a class by itself."
Via And the Difference is: "As Well As" that I could not add a comment on or contact so I made it here.