Ubuntu Studio is Linux-based operating system designed as a free, open, and powerful platform for creative people to create their art.
Ubuntu Studio is also Free and Open Source Software (FOSS). Ubuntu
Studio free to download and use. You can get the source code, study it
and modify it. You can redistribute Ubuntu Studio and can even
redistribute your modified version. Read more about these freedoms at
GNU.org’s Free Software page.
As an officially recognized derivative of Ubuntu, Ubuntu Studio is
supported by Canonical Ltd. and an amazing and continually increasing
Ubuntu Studio is released every six months, but a long term release
(LTS) version is released only every 2 years.
KXStudio is a collection of applications, artwork and plugins, targeted at audio and video production. KXStudio is also a Linux
Distribution, currently based on Ubuntu 12.04. Although focused on
GNU/Linux, some of our applications work in other Operating Systems.
The KXStudio project is divided into 4 categories:
- Repositories (it uses Ubuntu repositories (PPAs))2
Based on the information above, I would recommend that you go with Ubuntu Studio.