Just been looking at the cruise line stocks space and there's actually an interesting dynamic playing out between two very different players here.

So Royal Caribbean has basically dominated by going upscale, which is why it's the largest by market cap despite moving fewer passengers than Carnival. The numbers are solid—they hit $18 billion in revenue last year with nearly 110% occupancy (remember, that's two people per cabin by industry standards). What's catching my attention is their booking pipeline. Seven record-breaking booking weeks means they're not having to discount aggressively to fill cabins, which flows straight to the bottom line. Stock's up about 20% over the past year and trades at a P/E of 19, which feels reasonable for the stability they're offering in uncertain times.

But here's where it gets interesting. Viking is doing something completely different and it's working at a scale that shouldn't be possible. They're capturing over 4% of industry revenue while carrying less than 1% of passengers. That's because their whole model is premium experiences—child-free sailing, longer port stays, learning-focused itineraries. Their 96% occupancy last year was strong considering they deliberately cap cabins at two people. They're generating $6.5 billion in revenue (up 22% year-over-year) and only went public last spring. The stock's already up 55% since then.

Now, the valuation thing. Viking's trading at a P/E of 35, which is higher than Royal Caribbean obviously, but it's not wildly detached from the S&P 500 average of 30. What matters more is the growth trajectory and who their customers are. Viking's higher-income clientele makes them more recession-resistant, and their expansion plans are aggressive—27 new river ships by 2028 and 10 ocean ships by 2031.

If I had to pick between these cruise line stocks right now, Viking looks like the more compelling setup despite the premium valuation. You're paying more, sure, but the revenue per passenger is significantly higher and the growth rate justifies it. Royal Caribbean is solid and stable, but Viking's got the momentum and the business model that suggests faster returns ahead.