The National Emerald Club benefits are specific to National Car Rental and its associated brands. This means that the perk of choosing any vehicle from the Emerald Aisle, as well as additional advantages such as expedited service and rewards, are generally exclusive to the National Car Rental experience. While some partnerships may exist between National and other companies, such as certain rental rates or cross-promotional deals, the key benefits that come with the Emerald Club membership do not typically extend to other car rental companies. If a member is interested in knowing more about potential partnerships or how membership may translate to deals at other rental services, it is beneficial to check the National Car Rental website, as they may provide updated information on such collaborations or promotions.