When comparing Pantheon Terminal vs Xfce4 terminal, the Slant community recommends Xfce4 terminal for most people. In the question“What are the best terminal emulators for UNIX-like systems?” Xfce4 terminal is ranked 4th while Pantheon Terminal is ranked 17th. The most important reason people chose Xfce4 terminal is:
Like other applications included in the Xfce package, this terminal emulator is very lightweight and doesn't require many resources to run. This makes it perfect for systems that have low specs.
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Pros
Pro End process notifications
When a process has ended, Pantheon Terminal sends a notification bubble to the desktop notification server and indicates which tab generated the notification.
Pro Can easily restore a previous session
Pantheon Terminal remembers the window size, position, windowed/maximized/fullscreen state, and open tabs in between sessions.
Pro Advanced tab handling
Using the Granite Dynamic Notebook widget (which includes tab close history), double click the tab bar for a new tab, duplicating tabs, quickly closing all other tabs, auto-hiding/revealing tab close buttons, etc.
Pro Smart copy and paste
The keyboard shortcut for copy + paste is intelligently adapted andnbased on text selection and clipboard state. This makes it possible to use standard copy + paste shortcuts without colliding with standard ctrl + c behavior in the Terminal.
Pro Search feature

Pro Good for systems with low specs
Like other applications included in the Xfce package, this terminal emulator is very lightweight and doesn't require many resources to run. This makes it perfect for systems that have low specs.
Pro True transparency
You can set the transparency of the Xfce4 terminal on any amount you want, out of the box.
Pro Tabs support
Xfce4 fully supports tabs and tab-based navigation.
Pro Almost everything is customizable
You can configure size, color, background, etc.
Pro Composition effects
Xfce4 terminal takes advantage of xfce composition effects.
Pro Fast rendering
Pro Can be switched to a drop-down terminal
You can configure the Xfce-terminal to act as a dropdown terminal if you want, which makes for greater ease of use.
Cons
Con Heavy
Con limited customization options
Con RAM usage increases considerably over time
There is a RAM leak when using the Pantheon Terminal that adds up over time and use.
Con Incompatible with LTS Ubuntu
Pantheon is developed and binaries are released for a near blessing edge operating system (elementary OS). As such, installing it on an LTS Ubuntu system may be nearly impossible without replacing a large portion of the LTS stack that Ubuntu-targeted software expects.
Con Restrictive license
Con Cannot set text color for character under cursor to background color
Suppose you have a dark background with a light cursor and light foreground color: the light cursor will cover up whatever character it is on, so that you cannot read it. There is no option to set the foreground color for the character under the cursor to what is normally the background color. Such an option would allow you to read the character under the cursor.
Con Execution in xfce4-terminal - e mode is not always functional
Con Resizing text resizes window
Con No profiles
There's no profiles or profile-based customization in Xfce-terminal.
Con Can't scroll on spamming text
When text generates too fast, you can't scroll it, so you just can't read anything in such moments.
Con Does not support sixel images
