the Galaxy watch Ultra boasts Aerospace titanium an ip68 rating and mil STD 810h certification it can survive extreme temperatures altitude and environmental hazards the Apple watch Ultra 3 matches this durability with ML STD 810h certification and its ip6x dust rating but where Apple pulls ahead is in the water the Apple watch Ultra 3's w100 rating and N 13319 certification make it a serious tool for divers and water sports enthusiasts unlike the Galaxy watch Ultra which despite its 10 ATM rating can't handle high-press activities like jet skiing or deep sea diving now when it comes to visibility both watches perform brilliantly the Apple watch Ultra 3 has a 1.91 in OLED display with 52x 410 pixels while the Galaxy watch Ultra Sports a slightly smaller 1.5 in AMOLED screen with 480x 480 pixels