Both brands mentioned celebrate the concept of design. The timepieces designed at the manufacturing outlets of those brands undergo further testing beneath COSC (‘Contrôle Officiel Suisse des Chronomètres), which certifies the ultimate accuracy of their chronometers. One must give credit to Omega because of its innovative handcrafted mechanical watches that include some quartz pieces, when comparing both. As a matter of fact, Rolex watches have a level of accuracy that beats the ranking of COSC. Therefore, it provides timepieces with excellent chronometer certifications. Water Resistance Rolex and omega show excellence when it comes to water resistance. In fact, both have timepieces catering to divers and diving aficionados.