Instant Quote proposal means going into our instant quote marketplace to see if there are any suitable products. Products listed in the instant quote marketplace will give your quotes instantaneously. You can learn more about the instant quote marketplace here.
Custom proposal means to create a customised proposal from a list of over 50 product form templates. In this case, you can choose from any number of principals you represent to send the proposal to. You can learn more about this feature via this video tutorial.