Credit: Microsoft As Microsoft stock rises and Apple's falls over analysts expectation of slowing iPhone demand, the two firms are once more within $100 billion of each other — the smallest gap in over two years. Apple and Microsoft have a long history of competing for the title of the world's most valuable company, although originally that was specifically in the technology category. In 2010, Apple dethroned Microsoft when it hit a market capitalization of $222 billion, and then in 2018 Micros...