I have never had cats, is this a realistic/common thing? I’m curious

We buried a cat we thought was ours. He was hit by a car. Anyhow later that evening Sammy came home wanting to be fed.

The one to the left has a white ares that gore across its chest where ad the cat to the right has a batch that is isolated.

Makes it kind of hard to miss that it’s not the same cat. To me it looks like a picture of someone’s cats that a random user is trying to make internet points out of