When comparing Plank 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 Plank is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro Simple and minimal
Plank is a good choice for those looking for something simple that just does its job well. There is no UI for options built in to the dock as to change anything those options will have to be accessed through a text file.
Pro Third party themer available
An additional third party app has been developed that allows theming the dock without the use of any extra resources. This is great for those that are not using elementary OS and the elementary tweaks extra.
Pro Solid and light weight
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 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 Minimalist design, yet can use customizable themes
Also it's easy to make use of your own "plugin" (scripts).
Pro Clipboard history extension
Greenclip adds clipboard manager functionality: https://github.com/erebe/greenclip
Pro Easily switch windows without mouse
Con Poor workplace awareness (cycling windows)
When configured to only show apps on current workspace, cycling an app open on multiple workspaces will switch workspace focus, update the dock and often leave you to cycle another app.
Con No right click menu for some apps outside of elementary OS
Other file explorers and terminals (those not found in the default elementary OS) do not have any right click menus for the dock meaning it is impossible to launch multiple windows for certain file explorers or terminals.
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.