Greek yoghurt can contain more protein per 100 g than curd, also called dahi, depending on the pack. Compare plain products by their declared protein per 100 g and the cost of the portion you eat. A “Greek-style” name alone gives you no protein figure.
Compare two bowls on one basis
Greek yoghurt is often strained or otherwise made to have a thicker texture. Dahi also varies with the milk and recipe. Compare the numbers per 100 g before you compare a large tub with a single-serve cup. Suppose a fictional Greek yoghurt lists 8 g protein per 100 g and a fictional dahi lists 4 g. A 150 g bowl would give 12 g and 6 g respectively. Check your actual packs before using those figures.
Put a price beside the portion
If a 200 g cup costs ₹80, a 100 g portion costs ₹40 on that price. If a 400 g dahi tub costs ₹60, the same portion costs ₹15. These are sample prices. Compare plain with plain first. Flavoured variants can bring a different ingredient list and amount of added sugar.
Choose for the meal
If dahi is already on your lunch table, decide whether you want more of the existing side or a different pack that contributes more protein per bowl. Both can be used alongside a meal. The food-record guide helps you compare a few ordinary days. For more label arithmetic, see raw vs cooked food weights.