The Apple Watch SE took the place of the Apple Watch Series 5 as the company's entry-level device. New capabilities such as blood oxygen monitoring and a brighter always-on display were included in the Apple Watch 6 compared to Apple Watch SE, which is cheaper The 40mm and 44mm case sizes are both offered for both watches. Both have a battery life of 18 hours. The Apple Watch 6 has a brighter display and an always-on feature. Because it's 2.5 times brighter than the SE it should be especially easy to see outside. In addition, the Series 6 was available in a variety of materials and colours, including blue and red, while the Apple Watch SE was only available in metal. When it comes to processing power, the Apple Watch 6's S6 processor is up to 20% faster than those its predecessors. However, both devices include an always-on altimeter, gyroscope, compass, and GPS. The SpO2 sensor, which measures how much oxygen is in your blood, is the most significant health feature difference between the Apple Watch 6 and the SE. Unlike the SE, the Apple Watch 6 has an ECG monitor. Fall detection, noise level detection, emergency SOS, and international emergency calling are among the health and fitness aspects that are shared.