I've been on Carnival's cheapest and most expensive cruise lines — see how the $430-per-day difference compares

Brittany Chang/Business Insider

• Carnival Corp's diverse portfolio caters to both budget-conscious and luxury-seeking travelers.
• Seabourn offers high-end, all-inclusive, small-ship voyages.
• Carnival Cruise Line woos families and millennials with its affordable fares and large, flashy ships.

Indulging in complimentary...