Solus vs Puppy Linux
When comparing Solus vs Puppy Linux, the Slant community recommends Puppy Linux for most people. In the question“What are the best Linux distributions for desktops?” Puppy Linux is ranked 10th while Solus is ranked 22nd. The most important reason people chose Puppy Linux is:
Puppy Linux requires 128MB of RAM and 333Mhz of CPU, although 256MB of RAM is recommended.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Rolling release
Which means you don't have to suffer from version to version updates that can break it.
Pro Easy installation
The installation procedure for this distribution is quite simple. It's GUI based and all you have to do is to follow the instructions given by the installation window itself.
Pro Modern desktop environment
The default desktop environment used by Solus is called Budgie and is quite nice and minimalistic.
Pro Stable
The system itself is very stable. All packages in the repository seem to be carefully picked, well prepared and run stable.
Pro Responsive
System boots quickly and stays responsive. Does what operating system should do, and does it really well.
Pro Most stable Rolling Release Distro
Pro Exclusively for desktop systems
Pro Great package management
The software center makes it really easy to install the latest software through Snappy and Flatpak. Including third party software.
Pro Rock-solid Distro
Very stable and well curated.
Pro Lightning fast boot time
Pro Seamless packages
It may not have the most obscure packages, but the packages it does have is a good number of everything a Linux user needs. Gamers, developers, desktop users, etc. all have the necessary packages and then some. The packages themselves are integrated perfectly and are very well updated.
Pro Default experience is clean and easy
The default desktop experience on the Budgie version is very clean and streamlined. Although the Budgie DE isn't the most customisable, but it's customisable enough for me to recreate the desktop style of ElementaryOS with the dock and bar at the top.
Pro Friendly towards proprietary codecs, firmware and drivers
So you won't have to enable PPAs or extra repos for that.
Pro Well curated software
The software is well curated in the repos, you have access to flatpaks and snaps, so virtually, all the software you'll ever need is there for you.
Pro Friendly community
The only community who values the newcomers. Very helpful community.
Pro Built from scratch
Pro Extremely low minimum system requirements
Puppy Linux requires 128MB of RAM and 333Mhz of CPU, although 256MB of RAM is recommended.
Pro The whole OS runs off of RAM
Since Puppy Linux is completely loaded and run off of RAM instead of HDD, it's read/write speed is not a factor.
Pro Designed to run as a live USB/CD
A portable version, that can be carried on a thumb drive without requiring installation, weighs less than 100MB; a Live CD - less than 150MB. You can even save your settings and files for Puppy on the external device/media.
Running off a live CD also has security benefits, as your system will reset to the known config after each boot.
Pro Different distro based versions available
Puppy Linux offers a few different releases.
The first is an Ubuntu based release called Tahrpup, by using this version the user is able to take advantage of all software and support from Ubuntu.
The second version is called Slacko, which is built upon the Slackware binaries.
The third is called Wary and it is built to support older hardware than the rest.
And the fourth is called Quirky, which is used as a base to explore new ideas.
Pro Linux distro designed for this exact purpose
Pro Offers a long term support release
Puppy Linux offers an LTS release called Precise.
Pro It can be the only distro that works
Sometimes, Puppy Linux is the only distro that works on an old machine: all other distros are more demanding.
Pro JWM used as window manager
JWM is a low resource window manager that is used in most Puppy Linux installs.
Cons
Con Not much software
There is not much software available.
Con Lack of software in repositories
There is a lack of software in the repositories. This is the only OS where I have had to build some applications from source or install from the app's site within the first month os usage. Though this is most likely because the distro is still relatively new.
Con There is often a black screen after update
Con An upgrade breaks the system quite often
Con Forums are not very friendly
Con Systemd
Con No USB Image writer
Con The default desktop environment is not very customizable
Maybe because it's a relatively new project still in its infancy and this may be fixed in the future, but Budgie is not very customizable. You can only change the theme and wallpaper.
Con Slow development
Con Software a bit slower to launch than for other distributions
Con A bit ugly
Using puppy makes you feel like you just jumped 20 years into the past. Being that the purpose of Puppy Linux is to run or really low resource machines the software used is often on the older side, which is precisely why it has a 20 year old look.

Con Not as light as it used to be
It's light, but not as light as it was 1-2 years ago.
Con Smallest software library ever
You can barely find any precompiled packages for Puppy.
Con No built in compositing
Being a low resource distro there is zero built in compositing for the JWM window manager. Though one can be added through a bit of work.
