Main Difference
The main difference between Landscape and Cityscape is that the Landscape is a visible features of an area of land and Cityscape is a art genre.
Landscape
A landscape is the visible features of an area of land, its landforms and how they integrate with natural or man-made features.
A landscape includes the physical elements of geophysically defined landforms such as (ice-capped) mountains, hills, water bodies such as rivers, lakes, ponds and the sea, living elements of land cover including indigenous vegetation, human elements including different forms of land use, buildings and structures, and transitory elements such as lighting and weather conditions.
Combining both their physical origins and the cultural overlay of human presence, often created over millennia, landscapes reflect a living synthesis of people and place that is vital to local and national identity. The character of a landscape helps define the self-image of the people who inhabit it and a sense of place that differentiates one region from other regions. It is the dynamic backdrop to people’s lives. Landscape can be as varied as farmland, a landscape park, or wilderness.
The Earth has a vast range of landscapes, including the icy landscapes of polar regions, mountainous landscapes, vast arid desert landscapes, islands and coastal landscapes, densely forested or wooded landscapes including past boreal forests and tropical rainforests, and agricultural landscapes of temperate and tropical regions.
The activity of modifying the visible features of an area of land is referred to as landscaping.
Cityscape
In the visual arts a cityscape (urban landscape) is an artistic representation, such as a painting, drawing, print or photograph, of the physical aspects of a city or urban area. It is the urban equivalent of a landscape. Townscape is roughly synonymous with cityscape, though it implies the same difference in urban size and density (and even modernity) implicit in the difference between the words city and town. In urban design the terms refer to the configuration of built forms and interstitial space.
Landscape (noun)
A portion of land or territory which the eye can comprehend in a single view, including all the objects it contains.
Landscape (noun)
A picture representing a scene by land or sea, actual or fancied, the chief subject being the general aspect of nature, as fields, hills, forests, water. etc.
Landscape (noun)
The pictorial aspect of a country.
Landscape (noun)
a mode of printing where the horizontal sides are longer than the vertical sides
Landscape (noun)
A space, indoor or outdoor and natural or man-made (as in “designed landscape”)
Landscape (noun)
a situation that is presented, a scenario
“The software patent landscape has changed considerably in the last years”
Landscape (verb)
Create or maintain a landscape.
Cityscape (noun)
The view of the buildings of a city, usually referring to a pictured landscape.
Landscape (noun)
all the visible features of an area of land, often considered in terms of their aesthetic appeal
“the soft colours of the Northumbrian landscape”
“a bleak urban landscape”
Landscape (noun)
a picture representing an area of countryside
“the collection includes some 17th-century landscapes”
“a landscape painter”
Landscape (noun)
the genre of landscape painting
“he found he could not express himself in landscape”
Landscape (noun)
the distinctive features of a sphere of activity
“the event transformed the political landscape”
Landscape (noun)
denoting a format of printed matter which is wider than it is high
“landscape format”
Landscape (verb)
make (a garden or other area of ground) more attractive by altering the existing design, adding ornamental features, and planting trees and shrubs
“the site has been tastefully landscaped”