By Mark Lamport-Stokes PACIFIC PALISADES, California, Feb 20 (Reuters) - Americans Bubba Watson and Dustin Johnson share much in common heading into the final round of the Northern Trust Open on Sunday as prime contenders for the title. Both men are renowned for their power hitting, which has featured prominently this week high up on the tournament leaderboard, and they are both unabashed admirers of the iconic and always challenging Riviera layout. Watson, however, has two advantages over Johnson as he targets a ninth career victory on the PGA Tour. More...