Cosmopolitan vs Aria Las Vegas is the most evenly matched comparison on the Strip. Both opened within a year of each other at the heart of the central-Strip CityCenter block. Both target younger-leaning affluent travelers. Both are now owned by MGM Resorts — Aria from opening, Cosmopolitan after the 2022 acquisition. Picking between them is less about quality and more about design personality.
The Cosmopolitan Pitch
The Cosmopolitan opened in December 2010 after a long development stall left it half-finished through the financial crisis. Deutsche Bank ultimately took ownership and opened it as a deliberately design-forward property targeting a younger and more affluent traveler than the MGM Grand next door.
The 3,005 rooms are notably larger and more stylish than the Strip norm — most entry-level rooms run 700+ square feet, and many include private terraces facing the Strip. Private terraces are effectively absent from every competing Strip hotel, which makes Cosmo rooms instantly recognizable.
The Chandelier, a three-story bar inside a crystal curtain in the middle of the casino floor, is the property's architectural centerpiece. The Boulevard Pool doubles as a concert venue with views over Las Vegas Boulevard. The Secret Pizza Place — an unmarked pizza counter down an unlabeled hallway — is the running joke locals actually use.
The Aria Pitch
Aria opened in December 2009 as the centerpiece of the $8.5 billion CityCenter development. Pelli Clarke Pelli designed the curved twin-glass towers; interior public art (a James Turrell skylight, a Maya Lin silver-cast sculpture of the Colorado River) reads more like a museum than a casino resort.
4,004 rooms. The technology program made headlines at launch: automated in-room lighting, automated HVAC, digital panels for curtain control. That infrastructure has been refreshed since opening but the design intent — everything operates itself — survives. Aria holds AAA Five-Diamond status annually.
Rooms Compared
Cosmo entry Terrace rooms: 730 sq ft with a 50+ sq ft private terrace facing the Strip or the pool. City Rooms (no terrace): 730 sq ft. Wraparound Terrace Suites are the headline product at roughly 1,100 sq ft. Rooms refreshed in stages through 2019–2022.
Aria entry Deluxe King: 520 sq ft. Corner Suite: 1,040 sq ft. The top tier, Sky Suites (floors 51–60), is a hotel-within-a-hotel with dedicated elevators and check-in.
If a private terrace matters to you, Cosmo wins — no Aria room category has one. If floor height matters (Sphere views, Fountains views from altitude), both deliver above the 25th floor.
Dining Compared
Cosmo: Estiatorio Milos (Greek), Zuma (Japanese), Jaleo and the hidden é by José Andrés tasting counter (9 seats, two Michelin stars), Scarpetta, Eggslut, China Poblano. Broad range, strong across cuisines, heavy independent-operator lineup.
Aria: Carbone (Major Food Group's Vegas flagship), Catch, Bardot Brasserie, Javier's, Jean-Georges Steakhouse, Julian Serrano Tapas. Slightly tighter line-up; stronger on American and Italian.
Cosmo edges out for variety; Aria edges out for reservation-difficulty headliners.
Casino Floor vs Aria Casino
Cosmopolitan: 110,000 sq ft. BetMGM sportsbook. No dedicated poker room (closed during pandemic, hasn't reopened). The Chandelier sits in the middle of the floor.
Aria: 150,000 sq ft. 24-table poker room hosts the Aria Poker Classic twice yearly. BetMGM sportsbook expanded in 2020. High Limit Baccarat Room near the Sky Suites elevators.
Both use Mlife rewards now under MGM's ownership.
Pool and Spa
Cosmo's Boulevard Pool is one of the more atmospheric pool decks on the Strip — concerts several times a year, city views, smaller footprint than the mega-resorts. Marquee Dayclub sits on the 11th floor above the main pool area with three pools and a DJ-driven weekend schedule.
Aria's pool deck has three pools plus the adult-only Liquid Pool Lounge on the second level. The Spa at Aria spans 80,000 square feet with private couples suites. Lower-energy pool scene than Cosmo; better for travelers who want sun without club volume.
Which to Pick
Cosmopolitan if: you want a private terrace, a more design-driven room, a deeper independent-restaurant lineup, or concerts at Boulevard Pool during your stay.
Aria if: you want a Pelli Clarke Pelli-designed architecture experience, the Sky Suites top tier, a larger pool deck, a poker room, or the Mlife portfolio (you're also staying at Bellagio or MGM Grand next trip).
Both properties sit inside 3 minutes' walk of each other — and both connect to the Crystals mall and the CityCenter monorail station. For a Vegas trip focused on the central Strip, either works. The real differentiator is whether a private Strip-facing terrace is worth the premium Cosmo charges over comparable Aria inventory.
