You should expect different scoring models to produce different results. If you want to compare scores you need to be aware of the specific scoring model used. However, you cannot use a score generated by one model to determine a score generated by a different model. Even FICO has a number of different scoring models. See also the Understanding FICO Scoring subforum and its stickies.
There isn't just one correct score. Whatever score a given creditor pulls for you is what matters. That creditor will not consider other scores. That said, other creditors may use an entirely different score. Instead of relying on oversimplifications such as real, fake, correct, accurate, etc think about scores in terms of relevance to a given creditor.
