Amid the cruise industry's record-breaking "wave season" this year -- a period following the winter holidays when cruise companies offer discounted packages to entice buyers -- investors are curious to see if cruise line stocks can regain their lost luster. Today, I'll compare two major American cruise line stocks to determine which makes the better buy in the current market. With record-high bookings in recent months, Royal Caribbean Cruises (NYSE: RCL) plans to sail its full fleet this year and maximize earning potential.