When comparing Mosaic vs AROW, the Slant community recommends Mosaic for most people. In the question“What is the best window manager for Mac?” Mosaic is ranked 14th while AROW is ranked 22nd. The most important reason people chose Mosaic is:
Mosaic is probably the best window manager I have ever used for Mac. There are so many options available, you're sure to be able to set it up to suit your workflow… and the Mosaic Remote app gives Touchbar like control, without a Touchbar!
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Pros
Pro It's slick, quick, and does the trick…
Mosaic is probably the best window manager I have ever used for Mac. There are so many options available, you're sure to be able to set it up to suit your workflow… and the Mosaic Remote app gives Touchbar like control, without a Touchbar!
Pro Stays out of the way
While still allowing for insane customization.
Pro Support for multiple monitors
If you use external monitors, the app is useful. It also supports retina screen without problems.
Pro Customizable options
You can customize the app in Option, for example, where you can change the appearance of the preview outline, adjust the width of the recognition areas, and set keyboard hotkeys for quick window snapping.
Pro Define OS X window buttons
AROW enables you to change the actions of OS X’s window buttons. It only requires either a right or a left-click for the action to take place.
Pro Smart Panel to move and resize windows
The customizable grid panel is very intuitive and is an accurate way to resize and move windows. Simply drag your mouse across its grid, the window will be moved, and resize to the exact position instantly.
Pro Easy ways to snap windows
Simply drag windows to the edges of your Mac’s screen. Once the cursor reaches the screen’s edge, the window will automatically move and resize to fill exactly half or quarter of the screen.
Cons
Con Only the trial is free
Con Trouble with GUI
Yosemite (10.10.5) it works but it's impossible to open the application GUI.