When comparing Debian Testing vs openSUSE Tumbleweed, the Slant community recommends openSUSE Tumbleweed for most people. In the question“What are the best rolling release Linux distributions?” openSUSE Tumbleweed is ranked 5th while Debian Testing is ranked 6th. The most important reason people chose openSUSE Tumbleweed is:
Tumbleweed is stable enough to use every day. Updates are OpenQA tested to ensure stability before being released for Tumbleweed. Bleeding edge untested software can be tried using OpenSUSE factory.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Direct download of testing .iso
Debian supplies many different direct downloads of a testing iso.
Pro Stable
Tumbleweed is stable enough to use every day. Updates are OpenQA tested to ensure stability before being released for Tumbleweed. Bleeding edge untested software can be tried using OpenSUSE factory.
Pro Easy installation and cutting edge apps
Pro A large amount of software
Pro Tumbleweed + OpenSUSE Build Service
Pro Good selection of preinstalled applications
Pro User friendly + Good support
Active and friendly user community, updates come fast
Cons
Con Little / no third-party support
Like it or not, most third parties don't want to deal with less-popular distros. So most of them only support Ubuntu LTS and those versions of RHEL/CentOS that are still supported.