When comparing awesome WM vs i3, the Slant community recommends i3 for most people. In the question“What are the best window managers for Linux?” i3 is ranked 1st while awesome WM is ranked 2nd. The most important reason people chose i3 is:
Every feature is thoroughly documented (including examples), and documentation is kept up-to-date. For questions that are not answered by the i3 [user guide](http://i3wm.org/docs/userguide.html), because they concern tools outside of i3 for example, there is the community [question & answer site](https://faq.i3wm.org/).
Ranked in these QuestionsQuestion Ranking
Pro Low latency
Awesome was the first window manager to be ported to use the asynchronous XCB library instead of XLib, making it much more responsive than most other window managers.
Pro Highly configurable
Awesome is highly configurable, allowing the user to change anything they see fit in order to make the WM work for them and their workflow.
Pro Tags instead of workspaces
With awesome, clients are organized with tags: one client can be on more than one tag, and multiple tags can be displayed at the same time.
Pro Fully extensible with Lua
Pro Some mouse tiling support
You can rearrange and re-size [some] panels via the mouse.
Pro Keyboard friendly
Awesome is really keyboard friendly and you can do almost anything with keyboard shortcuts.
Pro Good default configuration
By default, you'll have a status bar (hidden in some modes), an application launcher, automatic fullscreen, manual fullscreen shortcut, etc.
Awesome always works as it should: it is very stable and reliable.
Pro Single window, multi-workspace support
The user can have each window visible on one, multiple, or no workspace. You can also temporarily include another workspace in the current one.
Pro Xinerama support
Awesome has real multi-head support via XRandR/Xinerama, with per-screen desktops.
Pro Any window can be full screen
Select the window. Hold ALT+SHIFT and press SPACE until the window takes up the entire screen.
Pro Easy module for useless gaps
Lain module makes useless gaps easy.
Pro Fully configurable (including tiling)
One of the biggest attractions of i3 is that it can be configured just about any way the user likes. Ranging from custom keyboard shortcuts to placement of opened apps, it is up to the user as to how they would like their window manager to behave.
Pro Easily readable plain-text configuration
i3 has plain-text configuration, meaning that no lua or haskell is needed. This makes it rather easy to recommend i3 to other people without worrying whether or not they have the knowledge to configure it as it can be read by anyone without prior knowledge.
Pro Easily switch to and manage floating windows
i3 can allow for the user to manage floating windows. Floating mode can be toggled by pressing $mod+Shift+Space. This way the user can take advantage of tiling as well as floating windows, all in the same session.
Pro Can tab windows
i3 permits tabbing through windows by turning on tab mode with $mod+w.
Pro RandR support
RandR provides more information about your outputs and connected screens than Xinerama does. To be specific, the code which handled on-the-fly screen reconfiguration (meaning without restarting the X server) was a very messy heuristic approach and most of the time did not work correctly — that is just not possible with the limited information that Xinerama offers (just a list of screen resolutions and no identifiers for the screens or any additional information). Xinerama simply was not designed for dynamic configuration.
Pro Fast, especially on weaker hardware
Tiling means there are no fancy compositing or window effects to take up system resources.
Pro Can stack
i3 allows for stacking of windows in its environment.
Pro No window gap
Space is not wasted by separators, therefore making the most of the confined space on smaller monitors.
Pro Can be reloaded quickly and configured without a client restart
Just two hot keys: Shift+Super+C to reload the config and Shift+Super+R to restart (which takes less than one second). Restarts pick up new versions of i3 or the updated config file, so you can upgrade to a newer version or quickly see the changes to i3 without quitting your X session.
Pro Sane development process
i3 uses test driven development with an extensive test suite to prevent bugs from ever happening again. All external contributions require a thorough code review to guarantee a certain level of quality.
Pro Terminal bell can be used to notify of completed actions
Terminal-bell gets passed through and marks the workspace visibly.
Pro Awesome multi-monitor support
User can assign specific workspaces to specific displays as well as apps to workspaces. This makes possible opening set of most used apps with 1 shortcut always on the same screens.
Pro Simple to use
Configuration is nearly automatic and simple, which can be really helpful to beginners.
Pro VIM Style key bindings
You can configure i3 so that your keys for moving windows is similar to vim, for example, M-j to move the window down.
Pro Great choice for keyboard users
The user keeps their hands in one spot (most of the time). One will find that the mouse is used less and less, making navigation quicker over time.
Con Difficult to google for solutions to problems
Awesome is a very common word, making searches for solutions to problems using Google very time-consuming as a lot of chaff has to be sifted through.
Con You should have some skills to configure it
Awesome, like most window managers, is targeted at advanced users. Though is has sane defaults and easy to read documentation, it is still a far jump from the more common graphical UIs found in computing.
Con Doesn't have tabbed containers
There is no option to have tabbed containers in awesome window manager.
Con Some programs don't cooperate well with tiling window managers
The user can usually work around this, but it can be quite annoying at the same time.
Con Regular API breakage
Results in many of the scripts for awesome to be found online end up being outdated.
Con Concept of layout sometimes does not fit what you want
The concept of layout sometimes does not fit what you want, for example, if you like the concept of layouts in tmux or in i3 - it works differently here.
Con Configuration uses Lua (Programming Language)
It is time-consuming to make changes to configuration. Though Lua is a good language, a plain text file to configure things would seem to be a better approach.
Con Missing "include" possibility in config
While pretty good and easy to use for common tasks, the configuration language is missing the
include directive common in other languages. You can use a workaround - a shell script to config parts on demand. It would be best if this were built-in however.
Con Poor floating window support
Sometimes this is necessary, even when the Dev rejects feature requests. Firefox child windows (option dialog) is an example.
Con No window gap option
You can do a lot with i3 but the official version lacks the option to have gaps between windows. However, there's a fork called i3-gaps that is almost the same as i3 except the fact that it lets you have gaps between windows.
Con Steep learning curve
Has a steep learning curve for beginners.
Con It has some issues with transparency
Using transparent windows can cause them to crash.
Con Not very configurable
Unlike XMonad or Awesome, i3 can't be configured in a turing complete language, so it is much harder to alter its core functionality to do exactly what the user wants.
Con The plain-text configuration may not be suitable for beginners
i3 is configured through a plaintext configuration file. While it's very powerful and easy to learn, it may not be entirely user-friendly for those who have never edited a text configuration.
Con Documentation is online
Can't access it offline unless you download the page.
Con Manual tiling
The layout isn't automatic. The user must move panels manually and may indeed end up spending time on that rather than on working with the application.