Being the head of a household implies that you have dependents. They should add to your deductions. The only way being the head of a household might not work for you is if you're married to a working spouse and filing a joint return. If you're using tax software (Taxact is free), you can easily experiment with your return to find out what works best for you.
The head of the household is the one that produces a greater tax return. This is because a person is assumed to have many dependants. However, it's good to contact the tax department so as to inquire more on the amount of tax that each particular person is supposed to file.