When comparing Window Tidy vs Gridsutra, the Slant community recommends Window Tidy for most people. In the question“What is the best window manager for Mac?” Window Tidy is ranked 33rd while Gridsutra is ranked 38th. The most important reason people chose Window Tidy is:
When you want to resize a window you just drag it on the screen and your configured workspaces appear immediately, semi-transparent. Then you just drag and drop your window above the configuration that you want to use.
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Pros

Pro Easy drag and drop interface
When you want to resize a window you just drag it on the screen and your configured workspaces appear immediately, semi-transparent. Then you just drag and drop your window above the configuration that you want to use.

Pro Allows multiple workspace configurations
Window Tidy facilitates not just window sizes, but windows that are precisely sized to fit together to fill up the screen.

Pro Fine tune window sizes
You can set up windows to fit as large or as small of an area on your screen as you would like. For example, if you want a 1/3 left, 1/3, center, 1/9 top right, 1/9 center right, and 1/9 bottom right, you can and it is easy to set up.
Pro Good Adobe support
Gridsutra has Adobe support with the ability of stacking Adobe windows.
Pro Simple UI
The interface if Gridsutra is well thought through and easy to use.
Pro Window arrangement with a single click
Windows can be arranged or snapped in Gridsutra with a single click.
Pro Intuitive UI and delightful user experience
Pro A great tool for a reasonable price
Pro Highly flexible
Gridsutra works with most MacOS applications.
Pro Great drag and drop functionality
The drag and drop option in the layout gives freedom to the user for arrangement of any windows to any positions desired.
Pro Useful ignore/unignore feature
The ignore / unignore feature in Gridsutra allows the user to block unwanted applications to be listed in the layout option.
Pro Custom layout support
Cons
Con Doesn't work - has been abandoned

Con Workspaces don't show up when you drag a window
Workspaces will only appear on one desktop, but not the others.
