The Co-axial escapement operates through a system of three pallets that’s separates the locking feature from the impulse. This is done via a pushing action, instead of the sliding action as seen in the traditional Swiss lever escapement. The automatically results in better mechanical efficiency.

The smaller contact surfaces and the pushing motion, as opposed to the lever escapement's sliding motion, significantly reduce the friction in the escapement; thus there is less wear and tear on the lubrication, resulting in longer service intervals (allowing a watch to last longer).

1999: OMEGA introduces the Co-Axial watch escapement | OMEGA US®

The coaxial escapement is a type of modern watch escapement mechanism invented by English watchmaker George Daniels in 1976 and patented in 1980. It is one of the few watch escapements which have been invented in modern times and is used in most of the mechanical watch models currently produced by Omega SA.

The Omega Speedmaster Super Racing is accurate to 0/+2 seconds a day, which is not too far from the most accurate watches in existence. It achieves this remarkable feat using the “Spirate” system.

The Co-Axial escapement functions with a system of three pallets that separate the locking function from the impulse, with the pushing, as opposed to the sliding friction of the lever escapement, resulting in greater mechanical efficiency.

The smaller contact surfaces and the pushing motion, as opposed to the lever escapement's sliding motion, significantly reduce the friction in the escapement; thus there is less wear and tear on the lubrication, resulting in longer service intervals (allowing a watch to last longer).

An OMEGA automatic movement uses springs and gears, self‑winding with each of your movements to power your watch, while the advanced Co‑Axial escapement regulates the tension, allowing for increased durability.

2500 description Omega's co-axial version of the ETA 2892-A2. Rate changed to 25200 from gen C onwards.

In terms of accuracy, both brands deliver exceptionally precise timepieces, which have a chronometer title. But in terms of accuracy, Omega wins over Rolex as they make both mechanical and quartz watches, which quartz tends to be more accurate than other watch movements.

omega Co‑Axial Master Chronometer Chronograph 44.25 mm Thanks to this trademarked component called a 'spirate' – a portmanteau of 'spiral' and 'rate' – the Speedmaster Super Racing is the first Omega to offer an accuracy of 0/+2 seconds– ie: it will gain no more than two seconds a day, and lose none.

Although Omega comes out on top, Rolex still boasts being an accurate and precise timekeeper, and watch buyers don't just buy a luxury brand for accuracy, but for other powerful aspects such as being robust, boasting magnetic, scratch, and water resistant which both brands offer.