winzip doesnt have as much issues unzipping 7 zip files as winrar does but winrar is famous for corrupting the files when it opens 7 zip compressed files.
for this reason its best to only use 7 zip to open or create zip files since thats what most modders use.
the big issue depends on what program is used to compress the files, winzip and winrar have no issues unzipping each others files but if 7 zip was used to originally compress the file then the only way to be sure you dont get a corrupted file when its opened is to use 7zip to open it.
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