Better Buy: Amazon.com, Inc. vs. Wal-Mart

Perhaps no two companies have helped to reshape the retail industry more than Wal-Mart Stores (NYSE: WMT) and Amazon.com (NASDAQ: AMZN). With its nearly $500 billion in annual revenue, Wal-Mart tops the Fortune Global 500 list for the world's largest corporations by revenue. And after two decades of torrid growth, Amazon is now the dominant online retailer.

As these companies have risen to power, they've earned a fortune for their investors along the way. But which is the better buy today? Let's find out.

We pit these two retail kings against each other to see which is the better buy for your portfolio. Image source: Getty Images.

Source: Fool.com