In the Italo high-speed train, what is the difference between club seat and "salotto"?

While booking a Milan to Naples ticket on the Italo high-speed train, I noticed some nice fares. Even the highest class, "Club Executive", has seats priced at €49 for a full fare on this stretch.

On the side, there is a "Salotto" option, which seems to be the same seat but in an enclosed compartment. Maybe there is some additional service, but there is something not clear. And it costs €200.

How can the price of the seat in "Salotto" be four times as much the price of an identical seat in the same class with the same ticket flexibility? Some less flexibly-priced regular Club seats are worth €29.

Does the high price justify special service, or is it simply that buying a single "Salotto" ticket gets all four seats in the compartment?

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In the Italo high-speed train, what is the difference between club seat and "salotto"? - Person in Passenger Train

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What is club executive on Italo?

Italo Club Executive, aka First Class, is the only class that guarantees more comfort and quality throughout the entire journey. You can look forward to unlimited WiFi and reclining faux leather armchairs, with large and comfortable seats, footrests, coffee tables and power sockets all available.

How do I choose my seat on Italo?

You can choose and buy your seat on board the train on the website, the Italo Treno app, ticket offices in the station or by calling Pronto Italo 06.07.

What is prima class on Italo?

Prima = 1st class Italo's Prima ambience features Poltrona Frau Leather reclining seats and air-conditioning with extra legroom & elbowroom compared to Smart class. There's free WiFi, power sockets for laptops, cameras or mobiles, complimentary wine or prosecco and snack served from a trolley.

What is the difference between Italo and Frecciarossa?

Italo trains are similar to Frecciarossa. The only difference is that they are run by a private company, and cannot be found on the Trenitalia website.

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Sebastian Pociecha, Алекке Блажин, Essow, Andrea Piacquadio