One difference between the two organizations is that the rules of the GASB need not apply to that of FASB. If the GASB had not covered an accounting topic that the FASB had, then the FASB standards would be used by the government entities. Under the rules of the FASB, SFAS No. 87 Employers Accounting for Pension must be followed by the financial entity. This is to establish measurement and display standards related to pensions. GASB No. 4 was issued by GASB, shortly after SFAS No. 87, which concludes that the standards established by SFAS No. 87 do not have to be followed by government entities.
The GASB and the FASB both have the authority to create rules. With the GASB having the ability to create rules that override the FASB, these two organizations may never resolve conflict. If they could coordinate their operations they may be a much more effective rule-making