La vista de una habitación de un hotel es (bonito) que la de un albergue.

La vista de una habitación de un hotel es más bonita que la de un albergue.

Explanation:

The view of a hotel room is nicer than that of a hostel.

La vista de una habitación de un hotel es más bonita que la de un albergue.

Explanation:

Comparative sentences are those sentences that contain some link that has a comparative value and that establishes a comparison relationship between two sentences or two elements within the sentence.  

In the sentence there is a comparative adjective that expresses a comparison of qualities between two elements., in this case is bonita. A comparative quantifier is added to it located in the first of the sentences, in this case it is the word más, which indicates inequality.