I got Cats and Dogs then City Living after, and I have to say personally was bored with only Cats and Dogs, but with City Living absolutely loved it. I loved the apartment life, new cultures, and events going on, love it!
Animals get difficult like in life, like you have to pay a lot of attention to them and take dogs on walks etc... but having said that, when I have a family with a little free time, I absolutely love the furry friends, they're flipping adorable!
I guess it just depends on what you prefer, and how you prefer to play, sims going out on the town all night or families? That's how I see it at least :smile: