The companies are quite similar and their gross booking volumes are quite comparable.
Over time, Booking has shown a much better revenue growth than Expedia.
Booking is also much more profitable than Expedia, which barely increased earnings over the past 10 years.
One area in which Expedia has outperformed Booking is the valuation (not totalreturn) of its stock.
Thestock markets sets the bar low for Booking Holdings which is a better buy thanExpedia.