Why is my Experian credit score different on the TransUnion website?

I am currently enrolled in Experian credit monitoring. I signed up to get all 3 scores from TransUnion just to see if there was a difference and there is! My score on the Experian site is 75 points higher than the one TransUnion shows as my Experian score. How can that be?? Shouldn't they be the same?

Public Comments

1. it's a risk model, not a thermometer
2. Because each of the credit bureaus has different information on their reports. Therefore, there will be some variation in the score with each of the 3 bureaus.