Key PointsNorwegian Cruise Line shares have pulled back, largely on the impact of Mideast tensions on fuel costs and passenger demand.That's not to say Norwegian will again disappoint when it next reports quarterly results this week, but shares in competitor Carnival may represent a stronger long-term opportunity.Similarly priced but with lower leverage and a 1.7% dividend, Carnival may beat out Norwegian Cruise Line when it comes to risk/reward…