IFB microwave ovens had several series, each with different models under them. The model names you provided (SRC, BRC, and FRC) do not correspond to any specific IFB microwave oven series that I'm aware of.
To determine which IFB microwave oven model is more advanced, you would need to check the latest offerings from IFB on their official website or visit an authorized IFB dealer. Manufacturers often release new models or update existing ones with advanced features and technology, so it's essential to refer to the most up-to-date information available.
When comparing microwave oven models for advanced features, consider factors such as cooking capacity, power rating, cooking modes, pre-set menus, smart functionality, control panel options, and other innovative features that make cooking more convenient and efficient. Always check the product specifications and features provided by IFB to find the model that best suits your needs and preferences.