When Oracle planned their clone of RHEL back in the days, I had a discussion with the Red Hat CEO on how to react. (I got the tip 3 months before Oracle went public with the announcement). I said to my CEO that the only real argument is simple. If you want to do commercial Linux, Red Hat Enterprise Linux is the only valid basis. To see SUSE and Oracle supporting that now, many years later is chefs kiss level of awesome :)