Using Python 3.5+ os.scandir() optimized variant.
Starting.
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*Collecting tree differences
Skipping system cruft (metadata) files in both FROM and TO
comparing [C:/MY-OTHER-STUFF] [D:/MY-OTHER-STUFF]
excluding D:/MY-OTHER-STUFF\__bkp__
comparing [C:/MY-OTHER-STUFF\Books-old] [D:/MY-OTHER-STUFF\Books-old]
comparing [C:/MY-OTHER-STUFF\Books-old\toshiba] [D:/MY-OTHER-STUFF\Books-old\toshiba]
comparing [C:/MY-OTHER-STUFF\Books-old\toshiba\admin] [D:/MY-OTHER-STUFF\Books-old\toshiba\admin]
comparing [C:/MY-OTHER-STUFF\Books-old\toshiba\admin\contracts] [D:/MY-OTHER-STUFF\Books-old\toshiba\admin\contracts]
comparing [C:/MY-OTHER-STUFF\Books-old\toshiba\admin\ORM_author_docs] [D:/MY-OTHER-STUFF\Books-old\toshiba\admin\ORM_author_docs]

...etc...

comparing [C:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\WhoUsesPython-Apr11\Technologist - GETCO - Job Board_files] [D:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\WhoUsesPython-Apr11\Technologist - GETCO - Job Board_files]
comparing [C:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\WhoUsesPython-Apr11\“Why is Python Installed on my Computer ” FAQ — Python v2.7.1 documentation_files] [D:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\WhoUsesPython-Apr11\“Why is Python Installed on my Computer ” FAQ — Python v2.7.1 documentation_files]
comparing [C:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\__pycache__] [D:/MY-OTHER-STUFF\Misc-old\vaioz-to-mar1514\__pycache__]
Phase runtime: 4.967186515691993
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*Reporting tree differences
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SAMEFILE DIFFERENCES: (name, dirfrom, dirto, why)
**These items will be replaced in dirto by automatic resolution**

[]
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UNIQUE ITEMS IN DIRTO: (names, dirfrom, dirto)
**These items will be deleted from dirto by automatic resolution**

[]
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UNIQUE ITEMS IN DIRFROM: (names, dirfrom, dirto)
**These items will be copied over to dirto by automatic resolution**

[]
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MIXED MODE NAMES: (name, dirfrom, dirto)
**These items will be replaced in dirto by automatic resolution**

[]
------------------------------------------------------------------------------- 
*Summary
Compared    => files: 39502, folders: 3987
Differences => samefile: 0, uniqueto: 0, uniquefrom: 0, mixedmode: 0
Changed:
files   => created: 0, deleted: 0, replaced: 0
folders => created: 0, deleted: 0, replaced: 0
-------------------------------------------------------------------------------
Finished.