When comparing WinDirStat vs WizTree, the Slant community recommends WinDirStat for most people. In the question“What are the best power user tools for Windows?” WinDirStat is ranked 12th while WizTree is ranked 16th. The most important reason people chose WinDirStat is:
GNU Public License (GPLv2).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Free / Open Source
GNU Public License (GPLv2).
Pro Color codes by file type
You can sort the list in the extension column (file type) globally or from parent folder selected. This is very helpful in case there are files of a specific type that you may not be aware of that's taking up too much space. Also, the colors correspond to the visual section.
Pro Lightweight
Pro PacMan Progress Bars
Pro Exceptionally fast for NTFS drives
Because it reads the master file table (MFT) directly from NTFS file system.
Pro Free
There is no limitation to using it.
Pro Multiple view such as tree view, tree map, extension view, file view
Unlike other similar apps, which usually only offer single view, this app offers multiple views.
Pro Handles "hard linked" files correctly - doesn't count them more than once
WizTree is faster and much more accurate than all the others as it properly handles hard linked files (doesn't count them more than once) so the total allocated size reported by WizTree will actually match the space used on the drive as reported by Windows.
Cons
Con Slow
There are faster programs.
Con Classic UI
interface are old and cluttered
Con Treemaps can be confusing to some
Con Intended for NTFS only
It'll work with any other file system but with the same speed as any generic space analyzer.