The Fundamental Rights are in the nature of denial of certain authority to the government. They are, therefore, negative in nature.
The Directive Principles are like positive directions that the government at all levels must follow to contribute to the establishment social and economic democracy in India.
The Fundamental Rights are justiciable and are enforceable by the court of law, the Directive Principles are non-justiciable.
In other words, the Supreme Court and the High Courts have the powers to issue orders or writs for enforcement of Fundamental Rights.
The Directive Principles of State Policy, on the other hand, confer no legal rights and create no legal remedies.
The Fundamental Rights do not require any legislation for their implementation.
On the other hand, the Directive Principles of State Policy require legislation for their implementation.