size, price. color, able to vacuum under couch, ability to determine which way to configure, for me it is important not to feel like I am sinking in deeply because it makes it difficult to get up---- as a senior citizen any time I can buy something that meets my needs, I am happy. Economy today is difficult on many of us seniors! Besides, when you are 80 y/o, one is not looking for a couch that will last 20 years or more----Carolyn