Question: Abu Dhabi or Dubai and WHY?

I'm hoping that you Internationally fab travellers can help me in a serious question, if you can pick one of the two which will it be and why, Abu Dhabi, or Dubai?  What to do, where to stay, where to shop, dine, adventure, entertainment? HELP?!

I am intrigued by both, and let's face it SEX AND THE CITY has glamourized desert moons, lunches in the dessert, riding camels, shopping, dining, and entertainment all with such impeccable style and cocktails to a degree that how can one not seek out the awesomeness?