Yahoo Finance analysis indicates that Microsoft's investment in AI infrastructure demonstrates greater spending discipline, with $678 billion in commercial remaining performance obligations (RPO) and internally funded capital expenditures, outperforming Alphabet's faster Google Cloud growth achieved through $70 billion in new debt financing. Microsoft reported $90.01 billion in revenue for Q4 FY, with Azure growing 43% year-over-year, annual revenue exceeding $100 billion for the first time, and generating $66.99 billion in annual free cash flow. In contrast, Alphabet reported $119.8 billion in Q2 revenue, with Google Cloud growing 82%, but had negative free cash flow of $5.86 billion and paused stock buybacks to support AI development. Furthermore, Microsoft Copilot has over 30 million paying users, while Alphabet's Gemini boasts 950 million users, though its enterprise revenue conversion remains unclear.