When comparing Ubuntu MATE vs Archbang, the Slant community recommends Archbang for most people. In the question“What are the best Linux distributions for an old machine?” Archbang is ranked 46th while Ubuntu MATE is ranked 48th. The most important reason people chose Archbang is:
ArchBang is minimal but completely functional out of the box. It's still up to you to set up to your liking. You still get Arch's unmatched documentation, insanely vast number of packages (in AUR) and extreme customizability. And a small but friendly and approachable community.
Specs
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Pros
Pro Works great on old laptops
It does not have a lot of system requirements so it works pretty well even on older laptops.
Pro Simplicity of Gnome with the power of Ubuntu
Debian was good to use but has limited documentation and is difficult to pick up. Ubuntu MATE brings the ease of design and logic of the Gnome 2 style desktop so it's easy to get around coupled with the vast documentation, forums and ease of learning/using the Ubuntu system.
Pro Perfect for people who like Gnome 2
The goal of MATE is to maintain the look and feel of Gnome 2, while maintaining compatibility with Gnome 3. To that end, it has also forked and renamed many of Gnome's core applications. It benefits from the years of work and polish that have gone into the Gnome project.
Pro Highly configurable
Comes with an option to configure as Windows-like, Mac-like, Gnome-like, etc. in a single click. Wonderful to get you started without having to learn it all from scratch.
Pro Behaves like Ubuntu with Unity - after Ubuntu-Gnome transformation
No better place to continue Unity experience with Ubuntu (Left-side panel, HUD) and not as awkward as Gnome.
Pro Based on Ubuntu
Pro The best features of Arch without the hassle
ArchBang is minimal but completely functional out of the box. It's still up to you to set up to your liking. You still get Arch's unmatched documentation, insanely vast number of packages (in AUR) and extreme customizability. And a small but friendly and approachable community.
Pro Rolling release
Being based on Arch, Archbang follows a rolling release schedule, ensuring that the software will always be on the bleeding edge.
Pro Lightweight
Archbang is a pretty lightweight distro. It uses Openbox as a Window Manager by default, without having the need to use a desktop environment which would only bloat the OS further.
Cons
Con No very good Software Center by default
The Software Boutique is not good. You can install Gnome Software from it.
Con Too much bloat included by default
Con Redundant
There is absolutely no reason to install it, since it uses the same package repositories as Ubuntu and you can transform any Ubuntu install into a Ubuntu MATE install.
Con Not bleeding edge
Users who want the latest and greatest software would be happier using Arch Linux, Antergos or another rolling release distro. However, because Ubuntu MATE is based on Ubuntu, users still have access to a large repository of recent software.