When comparing LaunchBar vs TotalTerminal, the Slant community recommends LaunchBar for most people. In the question“What are the best power user tools for macOS?” LaunchBar is ranked 9th while TotalTerminal is ranked 20th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Powerful file operations and filesystem browsing
Pro Clipboard history
Pro Abbreviation search which allows you to find items just by typing short acronyms of their name
Pro Access to bookmarks and history of all major browsers
Pro iTunes library browsing, searching and control
Pro Access to contacts and features like creating emails, tweeting, etc
Pro Predefined web searches and the ability to add your owns
Pro Allows quick access to the terminal system-wide
TotalTerminal is a plugin for Terminal.app. It provides persistent Visor Window which slides down when you press a hot-key.
Pro Quake style window show/hide
You maybe know or don't know Quake from Id Software. But this game had the best idea to hide/show a terminal window. Simply using full width but 26 rows. On show the widow slid down from top of screen. On hide it mode up to top edge of the screen until it disappeared. 2nd next best was the semi translucent background. You could still see through the terminal window while it was shown.
The same style is now available in TotalTerminal and iTerm2 (OSX Terminal replacement - no Terminal plugin).
Cons
Con No longer under active development
Con Doesn't work on El Capitan with SIP on
Apple introduced a new security feature in OSX El Capitan, called System Integrity Protection, that, among other things, does not allow augmenting Terminal. While it's possible to turn SIP off (instructions on how to turn off SIP and get TotalTerminal working on El Capitan can be found here) it is not recommended.