macos - Mac OS X 'compress' option vs command line zip (why do they produce different results?)

Question

I noticed that the command line 'zip' tool and Mac OS X's 'Compress XXX' option (available via right click in finder) are giving different output files. Not only is the size of the file a few hundred bytes bigger but the content is significantly different as well.

How can I find out what command the Finder is using for compression?

Answer 1

The answer is in man ditto:

 The command:
       ditto -c -k --sequesterRsrc --keepParent src_directory archive.zip
 will create a PKZip archive similarly to the Finder's Compress function-
 ality.