When comparing Yakuake vs Terminology, the Slant community recommends Terminology for most people. In the question“What are the best Linux terminal emulators?” Terminology is ranked 11th while Yakuake is ranked 12th. The most important reason people chose Terminology is:
Font size in Terminology automatically scales according to window size. When you resize the window, so does the text.
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Pros
Pro Drop-down terminal makes for ease of use
Yakuake is a drop-down terminal. This means that you can press, for example, F12, and it slides downward from the top edge of the screen. After you are done with it, you can then hit F12 again and it slides back on top.
Pro Very customizable
Almost everything in Yakuake is customizable: from split view, fullscreen mode, configurable dimensions, to animation speed and keybindings.
Pro Split layout
You can easily split any tab into different windows and run several commands at the same time then monitor and change them with ease. You won't find this feature in guake or tilda!
Pro Tabs support
Yakuake supports tabs, while working with several tabs is very easy. By default: to open a new tab press Ctrl + Shift + t
. To move through them: Shift + left/right arrow
.
Pro Unlimited scroll history
You can scroll, inside the same terminal session, infinitely, so no command should be lost, even it isn't stored yet on history.
Pro Lightweight
Opens at 40MB and stays below 100MB with some tabs splitted in four each. So if you need to have many terminals emulators opened in your desktop environment, is the a very light solution for all the features it includes.
Pro Quick move through splits and tabs
You can move through terminals with Ctrl+Shift+Cursors or tabs with Shift+Cursor keys, so no need to touch you mouse or pad, making working with terms even faster.
Pro Monitor for activity/silence
When an activity is let working (e.g.: compiling some source or upgrading some system), and you forgot it, a nice popup and sound will alert you when the command prompt returned on that term.
Pro Enhanced focused terminal
You can configure yakuake to show a visual altert when you change the terminal. So even if you have many splittings and you don't use the mouse to change between them, you can easily see where you are at any moment.
Pro Save output as text
You can save the output of a terminal directly to a text file, to work properly with it later.
Pro Wayland support
As the entire Plasma Desktop, yakuake already has full support for Wayland.
Pro Quick search support
Search directly in your favourite search engine just by selecting something and right clicking. It will open the browser result page.
Pro Scalable fonts
Font size in Terminology automatically scales according to window size. When you resize the window, so does the text.
Pro Looks smashing
Terminals are often very dull looks wise, not so with terminology.
Pro In-terminal video, picture and thumbnail support
Thumbnails, pictures, and videos can all be rendered in-terminal, based on the directory listing or mouse interactions. For instance, using "ls" on a picture folder will produce a list of thumbnails instead of only the filenames.
Pro Splitable
You can split windows, like in terminator.
Pro Visually customizable
It is very customizable in every aspect of the visual options.

Pro Integrates well with Enlightenment WM
Terminology is part of the Enlightenment WM packages. As such, it integrates really well with Enlightenment and other tools in the package.
Pro Block copy
You can copy text in blocks.
Pro Copyfree licensing
Terminology uses the Simplified BSD License. As it is a copyfree license, it tends to minimize license incompatibilities, legal compliance requirements, and various other complexities that may make it difficult to understand certain licenses.
Cons
Con KDE Library dependencies
While not an issue if using KDE, when trying to use this terminal in other desktop environments or window managers, there will be a large amount of dependencies tied to the app. This makes for a large install size. For those trying to keep their desktop lean, this may be an issue.
Con No sessions support
Con No Windows support
Con Theming options are very limited, Does not integrate naturally with the DE
Con Slow
Is not slow at all. I have yakuake installed in all my computers (8) and it launches immediatly after pressing the hotkey. Must be a error from yourt side.
Yakuake has started to get really slow with the latest updates: it takes up to 3 seconds to start up after you have clicked the assigned hotkey.
Con Heavy
Not true at all. I from far one of the lightiest graphical terminals out there. Mine is 14MB with a bunch of split views and 4 tabs at the moment of writing this.
Con Configuration is sometimes complicated and non-obvious
There's a "Settings" menu for configuration, but more options there would make it easier. Downloading themes and extensions from the official repo would be a big plus.
Con No True-Color support
Not able to display a modern full range of colors, yet.
Con Scrollback is completely nroken
Scrolling back the emulator inserts random lines from other places in the scrollback buffer in between the actuall output lines. Thus it is impossible to see a correct copy of the previous output.
Con No scrollbar
The lack of scrollbar in Terminology makes navigation difficult. But you can use keys for it.
Con Too many bells and whistles
Some people feel that Terminology has too many features that are not suited for a terminal, but for a window manager instead. For instance, viewing thumbnails, watching videos and gifs, and other similarly flashy things just feel like eye candy and should not be part of a terminal emulator.
