The difference between having two cats and having one cat
There's a big difference between having two cats and having one. Two cats are much noisier, especially at night. You need to prepare two sets of everything if you have two cats, but it's much easier and less expensive with just one cat. Also, cats with two cats tend to be less attached to their owners, whereas cats with only one cat are very attached. 
Explanation of the differences between owning two cats and owning one cat
There is a big difference between having two cats and having one cat. Two cats are much noisier than one cat, especially at night. Two cats will run around the house and may even jump on the table and cause trouble.
If you have two cats, you need to prepare two sets of everything because cats have a strong sense of territory. If you don't prepare two sets, they will fight. So, it's much easier to keep one cat and the expenses will be relatively less.
When you have two cats, they don't like to stick to you much. But when you have only one cat, it likes to follow you around. This is because when two cats keep each other company, their dependence on their owner decreases.
