The bare-knuckled competitiveness that helped it ascend may be a liability now that it's no longer a little tech company making beautiful but underappreciated devices. Apple's success in the digital music and mobile phone markets has transformed the company from an underdog with a cult following to a leader in the mass market. Investors recently made this change in status official, pushing the total value of Apple's shares higher than any other technology company's. That success is driven in large part by good technology and relentless innovation, but also by the lingering notion that Apple is, well, different from the...