It is indeed all, even if you ignore the "popular" qualifier. If a license could be unilaterally revoked, it would fail to meet the Open Source Definition for that reason.
The differences between the two are extremely minimal, basically only relating to patent rights relating to the software. Go read https://www.gnu.org/philosophy/free-sw.en.html - the FSF's Free Software definition, and https://opensource.org/osd - the Open Source Definition (both by the respective parties that coined the terms and maintain them to this day) and see what the actual differences are. They're not many.