While both the numbers tell you something, they are also somewhat misleading.
As an example. A boat with a low ballast number doesn't tell you much alone. If all that ballast is carried in a bulb at the end of a deep keel
she may have massive amounts of righting moment compared to a boat with huge amounts of internal ballast. This boat will also have a higher CSR since it doesn't carry the ballast weight, and so has a much lower displacement.
All despite the fact that the boat could very well be a much better offshore
boat than these numbers indicate.
Taken in isolation any of these numbers are at best an imperfect guide, and need to be understood in light of the other issues surrounding the boat. Even worse the numbers can be highly misleading when comparing two very different types of boats.