Hotel ColbertvsHotel Transatlantique
Both hotels are rated very highly by professionals. On balance, Hotel Transatlantique ranks slightly better than Hotel Colbert. Hotel Transatlantique scores 77 with endorsements from 2 reviewers like Lonely Planet, Rough Guide.
Hotel Colbert
 Rough Guide
Rue Chouia, Casablanca, Morocco
From $0/night
 Star
 "Conveniently located – one block from the CTM – and surprisingly large, though the hotel sign is difficult to see." 
Hotel Transatlantique
 Rough Guide
 Lonely Planet
79, rue Chaouia (ex Colbert), Casablanca 2000, Morocco
From $54/night
- Bar/Lounge
 - Free Internet
 - Room Service
 - Free Breakfast
 - Shuttle Bus
 - Laundry Service
 
 Star
 "Founded in 1922 in a Lyautey colonial building, and recently refurbished with a great mix of colonial decor." 
 "Set in one of Casa’s architectural gems, the decor at this 1922 hotel is all a bit over the top." 
 i 
Avoid the 1st floor, as it gets the brunt of noise from the popular and very rowdy piano bar and nightclub.