Choosing which Distribution to Download
openSUSE Tumbleweed is a rolling-release. This means the software is always the latest stable versions available from the openSUSE Project. Things will change regularly as Free and Open Source projects continually release new versions of their software.
Tumbleweed is recommended for Developers, openSUSE Contributors, and Linux/FOSS Enthusiasts.
openSUSE Leap is a regular-release. This means it releases annually, with security and stability updates being the priority during each release lifetime. It is not expected to change in any significant way until its next annual release.
Leap shares a Common Base System with SUSE Linux Enterprise, so major architectural changes are not expected for several years, aligned with each new Major Release (eg 12, 13, etc) of SUSE Linux Enterprise.
Leap is recommended for Sysadmins, Enterprise Developers, and ‘Regular’ Desktop Users.
Both distributions are well tested by openQA as well as by human openSUSE contributors so both can be relied upon to work.
Both distributions are fully capable of being used on a Desktop PC, laptop, server, or in the cloud.
If you are still not sure, download openSUSE Leap
It is easy to switch to openSUSE Tumbleweed if you change your mind later.