I stayed in a balcony cabin on Royal Caribbean's 2 newest and largest cruise ships. One was clearly better — and $900 cheaper.

Royal Caribbean assigned me an ocean-view balcony cabin for both complimentary sailings, the longest of which was three nights on Icon.

Both ships are operating seven-night cruises around the Caribbean in 2024.

Wonder of the Seas' balcony cabins start shy of $1,110 per person in 2024.

Even with nearly identical itineraries, the ones on Icon are, at their cheapest, a little more than $2,000 per person this year — or double that for the a New Year's cruise.

The pool decks were intensely colorful, the crowds were inescapable, and the long lists of activities and dining options were paralyzing.

The neutral tans, blues, and whites did not scream "we belong on the world's biggest and most colorful cruise ships."

The vessels have an almost two-year age difference, as evidenced by some of their decor (mainly Icon's recessed mood lights and the more chic, darker wood tones).

But besides the light fixtures, rugs, and — frankly negligible — wall art and pillows, both cabins were fairly underwhelming compared to everything outside their front doors.

Both had furnished 50-square-foot balconies.

Regarding the interior space, my 204-square-foot cabin on Icon of the Seas was 22 square feet larger than mine on Wonder.

In retrospect, I would've thought Icon's was smaller. More on that in a bit.

And both were flanked by light fixtures with built-in USB outlets, as is expected on most modern cruise ships.

The cruise line says the ships' balcony cabins use two twin mattresses that have been "converted" to make a king bed. It's a common practice I've never had an issue with — until Icon.

Unfortunately, I can't say the same for the new ship.

I (my back pain) could feel the hard ridge where the two mattresses met, making for a pretty miserable and uncomfortable sleep.

So much for starfishing — I kept to one side of the bed to avoid rolling over the bony bump.

Both had the same furniture I see on almost every mass-market ship: a couch that could convert into a bed and a desk that extended into a dresser.

Two thin wardrobes with drawers, hangars, and shelves surrounded either side of my bed on Wonder.

Icon, on the other hand, had one large wardrobe next to the living room.

Unfortunately, it had noticeably less shelving. And the metal bins let out ear-piercing screeches at every move — a lazy and annoying detail that the designers could've easily fixed with cheap felt pads.

I had two gripes with my Wonder bathroom: the lack of hair conditioner and the ill-positioned faucet that flooded the counter whenever I washed my hands.

I had the same issues on Icon. But that was the least of my concerns.

On Icon — the world's largest cruise ship — my bathroom was too compact for even one body.

Michael Bayley, the president and CEO of Royal Caribbean International, told reporters in January that 80% of Icon's 2,805 cabins were designed for families, a sharp increase from previous vessels like Wonder.

I'm not sure a family of four could coexist in Icon's balcony cabin — solely because of the bathroom size. There's no way two people could fit in there simultaneously. A fight over who gets priority access to the toilet could ruin a peaceful family vacation! (Which is to say, I'm glad I was traveling alone.)

The spare towels had to be stored on a shelf inside the shower. Because the counter was so small, I had to keep most of my toiletries and products on the shelves or in the drawer.

Surprisingly, that's where Icon excelled. Its bathroom had more storage options than its older counterpart, which didn't even have a drawer.

However, the older ship's shower had a clothesline perfect for drying swimwear. It's a small but crucial amenity, especially on a vessel with so many pools and waterslides.

Unfortunately, both were stocked with two-in-one body wash and shampoo — and no hair conditioner

My balcony cabin on Wonder looked less modern than its successor (the TV on Icon had Chromecast, after all).

But it was significantly more functional and comfortable. The bed was incomparably more pleasant, the closets had more defined storage components, and the bathroom was considerably larger, even if it lacked additional shelving and drawers.

Icon's cheapest balcony cabins are currently $900 more than the most affordable ones on Wonder — an almost $130 per person and day difference.

Based on the quality of the staterooms alone, if you prioritize functionality, comfort, and affordability over modern decor, consider saving money and going with the two-year-old ship.

Both ships have a fairly similar list of amenities. But only the newer one has a waterpark, an adult-only infinity pool club, and a swim-up bar, to name a few unique amenities.

So yes, Icon's balcony cabins are more costly. But the staggering price difference — and tiny bathroom — could be worth it if you think the its surplus of additional amenities is worth paying for.