The analysis compares Amazon (AMZN) and Microsoft (MSFT) based on revenue and return on invested capital. Amazon's revenue grew from $107 billion in 2015 to $691 billion, a CAGR of 21.1%. Microsoft's revenue increased from around $100 billion to $282 billion, a CAGR of 12%. ROIC for Amazon increased from 3.1% to 12.5%, while Microsoft's increased from 13% to 22%. A proprietary DCF valuation suggests an intrinsic value per share of $304.04 for Amazon and $480.87 for Microsoft. The current market prices are $234.27 and $488.97, respectively. Amazon is trading at a forward P/E of 31, while Microsoft is at 29. The analyst rates both as buys, preferring Amazon due to greater undervaluation.