It is known that sofa sets take up more space than corner sofas, as they leave the corners between sofas unused, as these empty spaces can be filled with side tables, but in small spaces, if the goal is to fill as much space as possible with seating, corner sofas will be a better choice than corner sofas. You can also use small service tables that have legs that go under the sofa and place them with the corner sofa for service. If your space is large enough to add more pieces, you should go for a sofa set. It is worth noting that if the space is very large, it may allow the corner sofa to be placed in the center and away from the walls to group the seating area and give it a more intimate feel, and use the rest of the space for other things such as a large dining table for example.