Both seem like excellent options for their use case. At that point, every small benefit helps make a decision. Even the support pricing doesn't seem too far off

Both seem like excellent options for their use case. At that point, every small benefit helps make a decision. Even the support pricing doesn't seem too far off if you have a reasonably sized cluster. Both are projects with over a decade and a half of development behind it, both use similar virtualisation architectures, and both have easy to use web interfaces, with distributed storage options and cluster management tools.