You have different score from different bureaus, because your cr

The 3 bureaus keep your credit reports. For some small banks and credit cards, they only report to one of the bureaus. So your credit report is not identical in 3 bureau and the credit scores (which is based on the credit reports) will be different. Usually, this happens when you don't have very long credit history or you don't have a lot of exiting trades (credit cards, loans, etc.)

But don't worry, any score >=740 will get you the best interest rate. So feel free to apply new cards and get the benefits (free air tickets, 0% bal transfer, etc.)