How come Experian, Equifax and Transunion have different scores?
They each have their own algorithm for scoring. I don't necessarily think that's a good idea but it does have a couple advantages.
When you apply for credit cards, loans and so and so, Do they go based on all 3 scores or is there something in particular they look more at in one of the 3 credit score company?
Usually the creditor works with one or two credit bureaus they work with. Since the credit records are similar, any of them should work. Most of the time a credit card company checks one bureau, maybe two. I've never heard of them checking all 3 credit scores from every credit agency.
Last Question: I know the 3 companies work independently but why they scores from Equifax and Experian are way higher than Transunion and Equifax and Experian are always close in the scores?
The Transunion scoring system goes on a higher range, generally speaking. I know this is confusing, because one would think they would all operate on the same numerical range for simplicity. Personally, I would favor them all operating on the same algorithm and score range.