Watch Series 6 44mm vs Watch Ultra 49mm

The Apple Watch Series 6 specs include an always-on Retina LTPO OLED display with a max brightness of 1000 nits, an S6 SiP with a 64-bit dual-core processor, water-resistance to 50 meters, Bluetooth 5.0, and a built-in speaker and microphone.

The Apple Watch Ultra arrived with a new case design with a flat sapphire crystal display, and an Action Button. The Apple Watch Ultra spec list includes an always-on Retina LTPO OLED display with a max brightness of 2000 nits, an S8 SiP with a 64-bit dual-core processor, a temperature sensor, Crash Detection, water-resistance to 100 meters, an IP6X rating for dust-resistance, L1 and L5 GPS, GLONASS, Galileo, QZSS, and BeiDou, a water temperature sensor, a depth gauge, Bluetooth 5.3, dual speakers with a three-mic array with beamforming, and support for fast charging using the Apple USB-C magnetic charging cable.

Common specs shared by the Series 6 and Ultra include a W3 wireless chip, a U1 ultra-wideband chip, 32GB of storage space, a Digital Crown with haptic feedback, an electrical heart sensor, a third-generation optical heart sensor, high and low heart rate notifications, irregular rhythm notification, an ECG app, International emergency calling, Emergency SOS, Fall Detection, GPS/GNSS, a compass, an always-on altimeter, and WiFi (802.11b/g/n).