They run Wear OS 7-based One UI Watch 9 software out of the box. Galaxy Watch 9 colors, sizes, and pricingAbhijeet Mishra / SamMobile Galaxy Watch 9's colorsThe Galaxy Watch 9 has a more comfortable watch strap with better breathability, a faster processor (Snapdragon Wear Elite), and a slightly bigger battery. It comes in two sizes (40mm and 44mm) and Wi-Fi-only and Wi-Fi + Cellular variants. It comes in just one size (47mm), and it has Wi-Fi + Cellular connectivity as standard. Pro-Grade Fitness Tracking Buy Galaxy Watch Ultra 2 Samsung Store47mm Wi-Fi + Cellular (LTE)