When comparing GNOME Do vs Rofi, the Slant community recommends Rofi for most people. In the question“What are the best Linux app launchers?” Rofi is ranked 1st while GNOME Do is ranked 12th.
Ranked in these QuestionsQuestion Ranking
Pro Plenty of plugins
By using the many available plugins Gnome Do can become a powerhouse of combined tools in one easily launchable and usable application.
Users can easily customize the looks of Gnome DO with the available themes in the settings of the app..
Pro Can run commands
<code>run: st toxic</code> Runs a tox client in the terminal emulator "st".
<code>run: maim ~/Images/screenshots</code> take a screenshot with "maim" and save it to given location.
Pro Great keybindings
They seem to be emacs based.
Pro Minimalist design, yet can use customizable themes
Also it's easy to make use of your own "plugin" (scripts).
Pro Case insensitive
Instead of having to worry about case sensitive characters, you can use caps or lowercase wherever you please without causing any issues.
Pro Clipboard history extension
Greenclip adds clipboard manager functionality: https://github.com/erebe/greenclip
Pro Easily switch windows without mouse
Con Has not been updated in a while
With the last update being dated Jan. 2014 development seems to be at a standstill.
Con Issues when Caps Lock is active
When typing with Caps Lock activated, it's impossible to use Backspace. Rofi eventually freezes in this scenario.