First class and business class are two levels of service offered on many commercial airlines. First class is generally the most luxurious and expensive option, while business class is a step below first class in terms of amenities and comfort.
The primary difference between first class and business class is the level of comfort and service. In first class, passengers are typically offered larger and more comfortable seats with more legroom and recline. Business class seats are typically slightly smaller, but still offer additional amenities such as adjustable headrests and footrests. First class passengers are also offered complimentary meals and drinks, as well as access to private lounges. Business class passengers may also receive meals and drinks, but these may not be complimentary. In addition, business class passengers may not have access to the same level of service staff as first class passengers.