Why do the figures on the EMP201 not match those displayed on the Payroll Reconciliation Report?

Why do the figures on the EMP201 not match those displayed on the Payroll Reconciliation Report?

This applies to all PaySpace editions.

The reports may not balance back to one another, because the Payroll Reconciliation Report may have been generated prior to the run being closed, whereas the EMP201 was generated after the run was closed.