Apple Watch Series 11 leads with 24-hour battery life and 2x scratch-resistant display versus SE 3's 18 hours and standard screen, both sharing the S10 chip and 5G per 2025-09-19 release facts. SE 3 wins on price at $249 versus $399, making it the pick for value-focused users. Series 11 justifies the premium for those prioritizing endurance and build per grounded specs.