Quick answer
In most cases yes, because the difference across a whole house is small relative to what it protects.
Wiring is typically 1–2% of the cost of building a house. Moving the whole installation up a fire-safety grade usually adds a few thousand rupees — against a rewiring job later costing lakhs, since it means breaking and re-finishing walls.
It is most clearly worth it where evacuation is slow or crowded: high-rise apartments with enclosed stairwells, homes with elderly residents or young children, basements with no natural ventilation, and buildings with a single exit route.
For a detached house with multiple exits, FR-LSH or HR-FR-LSH is a reasonable specification.
Compare the grades directly: Shakti FR-LSH against Anushakti Fire Protekt HFFR.