When comparing Eterm vs Extraterm, the Slant community recommends Eterm for most people. In the question“What are the best terminal emulators for UNIX-like systems?” Eterm is ranked 31st while Extraterm is ranked 40th. The most important reason people chose Eterm is:
Eterm requires only around 9 MB of RAM per terminal instance.
Specs
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Pros
Pro Requires very little memory
Eterm requires only around 9 MB of RAM per terminal instance.
Pro Transparency support
Eterm has pseudo-transparency support. This allows the user to make windows look less imposing (particularly in Terminal emulators which can comprise large chunks of text).
Pro speed
not the fastest ever, but for me its a good comprimise of features vs performance
Pro Cross platform
Pro Supports tab, splits and panes
You can set up your own layout with multiple splits and tabs.
Pro Shell integration
The shell integration makes it possible to group in command output in "frames" which show success/failure.
Pro Image support
You can view images and other data types like audio directly in the terminal.
Pro Keyboard based text selection
It is possible to go into a cursor mode where you can select text just like in a text editor. It even supports multiple cursors.
Pro Global shortcuts
You can configure global shortcuts to open the terminal.
Pro Keyboard friendly "Command Palette"
Just like Sublime, Atom and VSCode you can easily search and find commands from the drop down Command Palette.
Cons
Con Focuses too much on looking pretty
Eterm focuses a lot on being customizable and looking good, instead of focusing on features or power.