Our two most-ordered grains sit at opposite ends of the same shelf. Sona masoori is the light, familiar daily rice. Red rice is heavier, nuttier and keeps its bran. They suit different meals.
Sona masoori
A short, soft grain that cooks quickly and stays fluffy. It is the right choice when the rice is a backdrop — under sambar, rasam or a coconut-heavy curry — because it absorbs without turning claggy. Rinse until the water runs mostly clear, then cook with roughly two parts water to one part rice.
Red rice
Because the bran layer stays on, red rice takes longer, drinks more water, and arrives with a firm bite and a faintly earthy flavour. Soak it for thirty minutes if you can, use closer to two and a half parts water, and give it time. It stands up to strong, sour and spiced dishes that would flatten a softer grain.
A practical middle path
Plenty of households keep both and alternate — red rice on days when the meal is simple and the rice should be interesting, sona masoori when the curry is the star. If you are moving toward whole grains, blending the two in the same pot is an easier transition than switching outright, though you will need to soak the red rice first so they finish together.