In layman term, I have a folder with 4.76 GB, 19,875 files, and 3,803 folders. Using 7-zip version 9.2 I zipped into 2.2 GB. Using Winrar 5.11 I zipped into 2 GB.
Will I choose 7-zip or Winrar? Well, it depends. 7-zip can edit a file without unzip it somehow I don’t think Winrar has that feature.