A biographer spent years following Elon Musk and Steve Jobs. Here's how he says they're alike — and how they're different

• Walter Isaacson trailed Elon Musk for years and interviewed Steve Jobs over 40 times to write their biographies.
• He identified some similarities between the two, including their personalities and biggest weakness.
• The biographer also noticed a few key differences in the ways they ran their businesses.

It turns out that two of the world's most famous tech entrepreneurs have a lot in common — at least according to their biographer.