What differentiate Restricted Mudarabah (Mudarabah Muqayyadah) from Unrestricted Mudarabah (Mudarabah Mutlaqah)?

Restricted Mudarabah is a fund that will be utilized explicitly to a particular project of the account holder’s choice, whereas Unrestricted Mudarabah is a fund that will be placed in the bank’s general pool of Shariah-compliant banking activities.