diff command compares to see any difference betwenn two files. Can the same be used to compare two zip files, i.e if there is any difference in data ,like counts etc in individual files in the zipped files?
You will have to unzip them (if only in memory) to compare the two. A cool way I have seen to do this with
diff -y <(unzip -l file1.zip) <(unzip -l file2.zip)
That will show you if there are any files contained in one and not the other