I have seen the posts regarding accomodation and lifestyle. Well my views and few of the links below;
Abu Dhai is developing but living in Dubai for the past 3 years, Dubai has western lifestyle with bars and pubs around which mainly people from western countries are looking for. There are more options in Dubai for being social and having enjoyable family weekend- having Malls (Emirates Mall, Dubai Mall, City center) and many other amusement places.
Regarding accomodation ;
As compare to Abu Dhabi more options and variety based upon one's taste and pocket. You can have one bedroom apartment from 35K to 100K or more based upon location and your taste. The only thing is drive to AMMROC which can be hectic if you are alone however many people do car pooling/sharing to drive back and forth to Abu Dhabi which can be an easy option to stay in Dubai with your family.