6Only Guest HousevsInterContinental Porto - Palacio Das Cardosas, an IHG Hotel
Both properties are praised by those who travel for a living. On balance, InterContinental Porto - Palacio das Cardosas ranks significantly better than 6Only Guest House. InterContinental Porto - Palacio das Cardosas ranks #1 in Porto with accolades from 12 reviews like Lonely Planet, Fodor's and Condé Nast Traveler.
6Only Guest House
 Concierge
 Fodor's
 Frommer's
 Lonely Planet
Rua Duque De Loule, 97, Porto 4000-325, Portugal
From $129/night
- Bar/Lounge
 - Free Internet
 - Room Service
 - Free Breakfast
 - Multilingual
 - Air Conditioning
 
 "This century-old, converted city-center town house has six stylish double rooms and a light-flooded common space that opens onto a small garden patio." 
 "As the name suggests, this friendly modern guesthouse a short walk from the shops of Rua Santa Catarina has six rooms, so book ahead." Full review
 "They insist this is not a hotel, but a meeting place where visitors can really get to know the city. The colorful rooms are decorated with natural finishes in wood, cork, cotton and linen. " Full review
 Top Choice
 "This beautifully restored guesthouse has just six rooms, all with simple but stylish details that effortlessly blend old ..... with contemporary." Full review
InterContinental Porto - Palacio Das Cardosas, an IHG Hotel
 Star Service
 Michelin Guide
 Oyster
 Condé Nast Traveler
 Jetsetter
 Afar Magazine
 The Telegraph
 On the Grid
 Time Out
 Lonely Planet Show All Reviews 
Praca Liberdade 25, Porto 4000-322, Portugal
From $163/night
- Pet Friendly
 - Bar/Lounge
 - Hot Tub
 - Free Internet
 - Room Service
 - Laundry Service
 
 "Overlooking Liberdade Square, in an implausibly gorgeous old city location, with views of Oporto's baroque spires and UNESCO-recognized antique architecture, this is one of InterContinental's best." Full review
 "Menu: 20€- 65€ - Carte: 40€-56€" 
Luxury
 "InterContinental Porto Palacio das Cardosas is a luxury hotel housed in an 18th-century palace, and interiors are elegant and refined." Full review
86.3
 "A 105-room hotel on Praça da Liberdade, Porto’s elegant Belle Époque main square, in the heart of the city’s Old Town." Full review
 "Stunning city center sleep housed in a newly renovated 18th Century palace, steps from Oporto’s top sights." Full review
 "Spend a quiet, comfortable night in 5-star accommodations at the Porto Intercontinental." Full review
9.0
 "The five-star InterContinental lies in the heart of Porto’s historic centre and is the gem in Porto’s accommodation crown." Full review
 "Palacio Cardosas is a majestic hotel that dates from the 19th century." Full review
 "Take a relaxing bath in the marble bathroom before choosing from eight types of pillows at bedtime. For further relaxation, book a massage or facial in the hotel spa. " Full review
 "In a painstakingly restored former palace on the central Praça da Liberdade, this is a top choice for business and leisure visitors." Full review