From my experience so far, I believe a standard, robust, but lean enterprise-grade Linux distro (like openSUSE non-rolling release) is the best, and then you install just what you need. Most stuff in these 'Bitcoin distros' you don't actually need for running Core.
I tried testing and installing OpenSUSE in one of my computers but for some reason it refused to install, probably because of some unsupported hardware issue.
Similar thing can happen with Debian based linux, but you can always download unofficial ISO nonfree version, or some with extended hardware support.
One more good thing about debian with bitcoin node is that you will get support from community very quickly, if run into some problems along the way.
btw is OpenSUSE linux using ext4 files system by default or Btrfs?