When it comes to a queen vs. full mattress, the easiest way to decide is to ask yourself how many people will use the bed. If you plan on sharing with a partner, the wider queen mattress is a better option. Two people often find themselves too cramped to move on a full size mattress. If you’re a single sleeper, the question of which mattress is better for you will probably come down to budget and room space. A full bed costs less than a queen mattress and takes up less floor space.