Forum:By getting The Sims 3: Pets on Xbox 360 instead of The Sims 3, does it mean you're choosing one pre-made world over the other? And if so, which is better?

=By getting The Sims 3: Pets on Xbox 360 instead of The Sims 3, does it mean you're choosing one pre-made world over the other? And if so, which is better?=