Cost of living in Abu Dhabi (United Arab Emirates) is 5% cheaper than in Al Mubarraz (Saudi Arabia)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 1,131 prices entered by 186 different people.
For example, to keep the same standard of living that would require ﷼ 14,000 in Al Mubarraz you would need to make just about ﷼ 13,295 (Dirham 13,018) in Abu Dhabi.