My answer would be : it depends.

- In case the difference is small (i.e., the amount is rounded off to the nearest whole number), then probably that is okay.
- In case there is a big difference, you should bring it up. 

There is a possibility that, according to the organizational policies, the package you ought to get is higher than you quoted, and they are offering you the company-standard package (which is higher than your expected number). 

However, given that you have interview scheduled, you don't want to lose a chance because of any human errors in communication. So, if there is a big difference, better to have it clarified with HR.

After all, we all want to _earn_ our paychecks.