1. The number of rivers that flow into the Bay of Bengal are more than the number of rivers that flow into the Arabian sea.
2. Major rivers that flow into the Bay of Bengal are the Brahmaputra, Ganga, Mahanadi, Godavari, Krishna and Kaveri. Major rivers that flow into the Arabian sea are the Narmada and the Tapti.
3. The rivers that flow into the Bay of Bengal are generally larger than the rivers that flow into the Arabian Sea.
4. The rivers that flow into the Bay of Bengal​ are slow moving rivers and carry a lot of silt and sediment. They are useful for navigation and irrigation. Rivers that flow into the Arabian sea are fast as they flow through hilly terrain. They are not useful for navigation and irrigation.
5. Rivers like Brahmaputra and Ganga have their origins in the snow covered mountains of the Himalayas. Hence, they are perennial rivers. On the other hand, the rivers that flow into the Arabian sea are seasoanl and dry out in the non-rainy season.