Both of these top tech companies have established leadership roles in the AI industry.Both Microsoft (MSFT 1.04%) and Alphabet (GOOGL 1.03%) (GOOG 1.01%) continue to grow as they solidify their positions in the artificial intelligence (AI) industry. Amid a recent surge, Alphabet's market cap has reached almost $3.9 trillion, while Microsoft's has pulled back slightly to$3.6 trillion.What's unusual is that the Google parent was substantially smaller than the software giant until recently, when Alphabet pull ...