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

Answer 1

Take a look at An AppleScript to compress a Finder selection article.

try
    tell application "Finder"
        set theSelection to the selection
        set selectionCount to count of theSelection
        if selectionCount is greater than 1 then
            error "Please select only one Finder item before running this script."
        else if selectionCount is less than 1 then
            error "Please select one Finder item before running this script."
        else
            set theItem to (item 1 of theSelection) as alias
            set destFolder to (container of theItem) as alias
            set itemName to name of theItem
        end if
    end tell

    do shell script ("ditto -c -k --sequesterRsrc --keepParent " & quoted form of POSIX path of theItem & space & quoted form of (POSIX path of destFolder & itemName & ".zip"))
on error theError
    tell me
        activate
        display dialog "Error: " & theError buttons {"OK"} default button 1 with icon stop
    end tell
end try