When comparing Guake vs LilyTerm, the Slant community recommends Guake for most people. In the question“What are the best terminal emulators for UNIX-like systems?” Guake is ranked 11th while LilyTerm is ranked 19th. The most important reason people chose Guake is:
You can hit F12 (by default, though it's customizable) to open a terminal overlay, Quake-style, as a drop-down from the top of the screen.
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Pros
Pro Drop-down terminal
You can hit F12 (by default, though it's customizable) to open a terminal overlay, Quake-style, as a drop-down from the top of the screen.
Pro Supports transparency
Transparency is particularly useful for when you need to refer to the information displayed by application under Guake window.
Pro Hotkey support
Guake is very fast and easy to open with a customizable hotkey, meaning there's no fiddling with menus or icons.
Pro Extremely customizable
Guake's appearance is very customizable: from the transparency to the width and height of the window. You can also choose which key to use for toggling the terminal window.
Pro Available in many popular distro repositories
Guake is available in a lot of repositories for the most popular distros. This makes it very easy to obtain and install on almost any system.
Pro Shortcut key F12 can be used to toggle
The global shortcut key, F12, can be used to easily toggle the terminal window.
Pro Tabs support
Guake supports tabs, while working with them is very easy.
Pro Can choose byobu as shell
You can choose byobu as shell, by adding a line to /etc/shells : " /usr/bin/byobu"
and get guake with byobu ... sweet!
Pro Support for tabbing
You can also color and reorder tabs, as well as manipulate tabs through keybindings.
Pro Transparency support improves usability
LilyTerm has true transparency support, making for better GUI usability.
Pro Change encoding on-the-fly
LilyTerm can change encoding on-the-fly. UTF-8 is the default encoding.
Pro Lightweight
LilyTerm is a terminal emulator that aims to be as lightweight as possible. It requires minimal system resources and has very few dependencies.
Pro Fullscreen support
LilyTerm has fullscreen support which improves visibility.
Cons
Con Not cross-platform
Linux only, and additionally targeting GTK3.
Con Not very responsive
Occasionally, Guake slows down and is not very responsive.
Con No font ligature
Guake uses vte for its terminal emulation, and vte simply doesn't support font ligature (yes, it's 2019). This is what its maintainer thinks about it.
He really thinks supporting font ligature breaks terminal's grid, like he doesn't understand a font that's monospace is a monospace no matter if it has ligature or not.
Con Annoying behaviors
The default configuration may have some annoying behaviors (that can be removed by changing the default config). Such include asking for confirmation when reusing an existing window or when starting the terminal to launch a specific command.
