Both are display servers which is software that allows programs to write to the screen. X is older and was created back in 1984 at MIT and Wayland is a much newer protocol that is designed to work better on newer (post 90's) hardware.

The biggest difference is that Wayland basicly allows your desktop direct access to the screen and X has a server that runs and allows your desktop to connect to it. X was originally designed to run remotely as back in the day there was one big commuter that many people connected to.

If this is all very confusing you probably should just stick to your distros defaults. Most of the time you don't need to care.

From a user perspective, Wayland is smoother and looks nicer.

xorg is a old implementation of x11, which is basically abandon-ware right now. No one is adding feature to it, testing it, or fixing security vulnerabilities. It also lack some common-sense security feature: for example every program can get every input (keyboard and cursor location) without root, so a key logger is trivial to implement in xorg.

Wayland is newer, with more features (reasonable multi-monitor support, one-to-one gestures, etc). But many application framework and hardware have poor support for it, because it is slightly newer (developed on 2008, so not that new any more). Notably, electron and nvidia are typically the worst offender, like everything on linux, but both has come a long way.

I have wayland on my laptop, since one-to-one gesture is a must for me, and I present quite often using that laptop. My desktop is on xorg, since I have a nvidia GPU and use quite a lot of electron app.

Desktop Linux is in its never-ending process of replacing old displaying system with new one. The process is long and not really transparent, because the two displaying systems were designed in completely different times for different hardware and with different security concerns in mind, therefore the X11 clients (all the software that was ever made or ported to Linux) are very much incompatible with Wayland. For backwards compatibility there’s Xwayland, which provides full blown Xorg server running on top of Wayland compositor with all the things X11 app requires. Until now, Firefox, even though had its Wayland backend as WIP feature (possible to activate with environment variable MOZ_ENABLE_WAYLAND=1) it defaulted to Xwayland on Wayland sessions. It now uses native Wayland backend by default providing better efficiency, DPI scaling, touchpad gestures etc

I'm not an erudite so feel free to correct me c:

Wayland is a new implementation on how your system draws windows and components in your computer (I'm not sure if it's responsible for the content) and it tries a different way to do it compared with xorg.

Xorg is the old implementation, and it has been patched to support most of the new features, and Wayland is trying to get the same features xorg has and some extras.

As a Linux user I have noted that sharing screen is more private in Wayland, also I think multi monitor refresh rate was a problem in xorg. One common issue with Wayland is the GPU compatibility, as far as I know Wayland runs better in AMD GPU I think is because of Mesa integration.

I'm not an expert on the matter so have a Wikipedia link.

Thanks for all the responses. All of them have been so helpful. What I'm getting is that at this moment Wayland can be seen as a successor to Xorg?

I wouldn't worry about it too much; there's not really anything you need to do as a user anyway.

[This comment has been deleted by an automated system]

Xorg = Massive screen tearing

Wayland = No screen tearing

Xorg = Nvidia friendly

Wayland = Fuck you nvidia!

For a user: In Wayland programs are supposed to draw their own title bar. Java aplications and old applications must use a backwards compatibility layer that can cause flicker and bad font rendering. The terminology is different (compositor = window manager). Some niche new programs may only run on Wayland. Wayland hasn't been adopted by BSD (AFAIK).

For a programners: Wayland has more modern, tidy code, but not all toolkits support it natively and few are easy. If you code exclusively for Wayland, a lot of users won't use your program at the moment.