I'm currently running the Dragonized edition of Garuda and love it. I was also playing with the i3 version and found that awesome as well. I know I can install i3 using pacman -S, but I also want all the awesome extras and configs that y'all have made to the i3 version.
My question: Is there an easy way to install the i3 version alongside the dragonized edition?
I would love to be able to switch which version I'm running by just logging out and back in to the new WM.
Well I've done some experimenting and failed gloriously. I found the i3settings PKGBUILD from the GitLab and attempted to "install" it while inside KDE. Step by step of what I did that failed.
This messed up settings for KDE and did not make any changes to i3 from what I could tell. All of the keybindings were default and the background was black.
I used the awesome built in timeshift feature to restore to a version before I made these changes. (phew) So I'm back to running Garuda Dragonized edition.
I am not the proffessionell De in DE builder.
New user and 'garuda-i3-settings' 'i3-wm' maybe more but you do not need build by self, it is all in repro/chaotic AUR.
Latest attempt: Installing i3-wm i3-gaps i3-status garuda-i3-settings and it failed. Output below
╭─joe at x1 in ⌁-i3
╰─λ sudo pacman -Syu i3-gaps i3-wm i3status garuda-i3-settings
:: Synchronizing package databases...
core is up to date
extra is up to date
community is up to date
multilib is up to date
chaotic-aur 827.9 KiB 945 KiB/s 00:01 [----------------------------------------------------------------------------------------] 100%
:: Starting full system upgrade...
resolving dependencies...
looking for conflicting packages...
warning: removing 'i3-wm' from target list because it conflicts with 'i3-gaps'
:: garuda-i3-settings and garuda-dr460nized are in conflict (garuda-desktop-settings). Remove garuda-dr460nized? [y/N] n
error: unresolvable package conflicts detected
error: failed to prepare transaction (conflicting dependencies)
:: garuda-i3-settings and garuda-dr460nized are in conflict
╭─joe at x1 in ⌁-i3
╰─λ
Based on the error text there may not be a way to have the i3 version and Dra460nized editions running on the same machine. 
Yes it most likely can be done.
However, I generally avoid giving advice in this area for one simple reason. If you are inexperienced and need to ask, then it’s probably something best left alone because of the issues it can create.
If you search terms such as “install multiple DE’s” on the Manjaro or EndeavourOS forums you will likely find the information you need. @dalto is a moderator on both of those forums. He is likely your best source for advice. You can input a users name into our forum search engine (as well as other forums using the discourse forum software). Adding a users name in your search terms will further refine your search hits returned. Use the search terms below in a discourse based forum’s search engine to fine tune your search to a specific users posts on a topic.
Example:
@dalto install multiple desktops
@dalto has given very useful information on this topic in the past. Generally, myself and other moderators on this forum prefer not to discuss this topic on our forum. The reason for this is that inexperienced users that install multiple desktops often create major problems for themselves on their systems. Then they inevitably open help threads for assistance, but rarely mention up front that they have installed multiple DE’s. This creates a support nightmare that wastes a ton of support resources as tracking down the bugs these types of installations can create can be very complex and time consuming.
If you wish to install multiple DE’s, that is considered a non-standard installation method, and you will likely not receive support for it on the Garuda forum.
Feel free to tinker with your own system any way you feel fit. Just don’t expect Garuda support staff to come rushing to your assistance if you break your systems stability with your non-standard installation attempts.
Basically, if you break it, you fix it with these types of non-standard install methods.
Have fun playing with your system. 
@tbg Thank you for the information, it wasn’t what I wanted to hear but what I needed. I’ll put this idea on hold until I get more familiar with Garuda Dragonized 
Best way to install multiple DEs is to make a new user and install the 2nd DE for that user. Mixing DEs results in inconsistent theming.
However, having said that, I've used KDE+Openbox numerous times and really like it. I mean KDE+Openbox for a single user installation. After installing Openbox ( or i3 ) in SDDM, choose KDE+ Openbox ( or i3 ). Getting a consistent theming however, can be quite challenging. Openbox or i3 doesn't look as good as KWin but is much faster. Everything has it's pros and cons.
Mixing Gnome or Cinnamon or Budgie and KDE w/o creating 2nd user, creates a bit of a mess. Still doable though. Give it a try. 