it's not a special difference, just a low-cost airline. Low-cost airlines don't mean to save money on aircraft maintenance, but to save all unnecessary services, only to deliver passengers safely to their destinations, and to provide no meals and free checked baggage by default, thus giving passengers who don't have to ask for these two services a lower fare option. And if necessary, you can also pay for these services. To put it bluntly, it is to give passengers more choices. It is a good choice for people who need to spend less money to reach their destination, but for passengers who think that flying is tall, consciously bypass it.