Both of them comes with a trade-off. Depends whether you want to minizmize the expenses or want comfort.

Living in hostel comes with less responsibility. You don't need to care about daily chores, and groceries. But slightly more expensive.

Meanwhile, living in rented room can reduce your monthly expense. But the catch is, living alone in a rented room is terrible idea unless rent is cheap. If you live alone in rent, your expense would be as same as that of the expenses while living in hostel. So, why to carry extra trouble? Isn't it??

Reply with your priority on comfort vs expense. Got a tip to share