The goal was to design the most thoroughly thought through piece of cabin size luggage for those wishing to travel on business or leisure with hand luggage only. (thetravelmagazine.net)
Beyond that, there are differences in cabin size, bed size, and engine performance. (joemyersford.com)
However with luggage restrictions getting smaller every year and more people opting to take only cabin size luggage it's now harder to fit in all your clothes and essentials. (us.amara.com)