Why is the diff command in Mac OSX terminal unable to pick up file size differences Finder detects? -

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i used 7zip create .7z file folder had. afterwards, unzipped .7z file , used finder compare differences between 2 folders. appeared 2 folders differed in size 200,000 bytes. then, used diff command in terminal compare:

diff -rq folder1 folder2

to surprise, nothing showed up. there explain difference? there way use diff find why these show different sizes when click on info through finder? thanks.





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