1, first of all, it is different in nature. The registration of establishment in house mortgage belongs to this kind of registration, and its registration is final. However, the pre-registration of housing mortgage loans is preliminary registration, not final registration. In the end, it will either be eliminated or transferred to the establishment registration of housing mortgage.

2. The certificates of rights issued are different.

3. Third, it has different legal effects on the mortgagee. When the debtor fails to perform due debts and the mortgage right is agreed to be realized, the mortgagee who announces the mortgage registration cannot enjoy the priority right of compensation for the mortgaged property auctioned or sold, but the mortgagee who officially registers the mortgage has the priority right of compensation for the mortgaged property auctioned or sold.

4. The duration is different. The period of advance notice mortgage registration is three months after the advance notice registration. If the creditor's rights are extinguished or the application for registration is not made, the advance notice registration is invalid. After mortgage registration, in any of the following circumstances, the mortgage right is extinguished: the principal creditor's right is extinguished; Realization of security interests; The creditor waives the security interest; Other circumstances in which the security interest is extinguished as stipulated by law. It is worth noting that the obligee of formal mortgage registration should exercise the mortgage right during the limitation period of the main creditor's rights, otherwise it will not be protected by the court and lose the chance of litigation.