There's a clear winner between these two "Dividend Kings."Out of almost 54,000 publicly traded stocks in the world, just 55 have achieved "Dividend King" status by raising their dividend for at least 50 years running. That means barely one in 1,000 companies have made the cut, and there are several reasons why it's so rare. To achieve this milestone, a company must be highly resilient, innovative, and able to succeed amid all kinds of market conditions.Both PepsiCo (PEP +3.50%) and Coca-Cola (KO +0.17%) are ...