Ech has its own algorithim so it weighs various events in your credit life differently. My feeeling about FAKOS are that there are an indicator - up you are doing better, down you have messed up somehow.
Sometimes they are right on with FICOs (or darn close) other times they are way off. I don't place alot of faith in them but I enjoy seeing them go up (hopefully) - at a much lower cost than pulling FICOs.