[lotsofpulp]

This price discrepancy almost never happens due to advances in integration of the reservations systems. When a chain hotel changes its prices, it almost immediately is reflected on Expedia/booking and other websites.

Usually, the price discrepancy is because someone is comparing prices on different dates/times after the prices have changed, or the price is not actually advertised (auctioned rooms at random hotels like on Priceline), or some type of car rental/flight package pricing by the travel agent.