When comparing TotalTerminal vs Hyperdock, the Slant community recommends TotalTerminal for most people. In the question“What are the best power user tools for macOS?” TotalTerminal is ranked 20th while Hyperdock is ranked 25th. The most important reason people chose TotalTerminal is:
TotalTerminal is a plugin for Terminal.app. It provides persistent Visor Window which slides down when you press a hot-key.
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Pros
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).
Pro Lots of small improvements to the dock
Hyperdock adds a lot of small improvements to the default mac dock, like better iTunes controls and calendar event previews.
Pro Select individual application
Select individual application windows just by moving the mouse on a dock item, use mouse clicks to quickly open new windows and many more.
Pro Lets you easily find a window you have open
Pro Scroll up/down on menu bar to change size
Scroll up for full size.
Pro Snaps to corners
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.
Con Not under active development
Hyperdock doesn't seem to be under active development and hasn't been updated since october 2014.