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Smartwatches / Compare

Samsung Galaxy Watch Ultra vs Samsung Galaxy Watch6 Classic

62 of 141 fields differ

Download CSVDownload JSON
  • 38 different values
  • 24 known for one only
  • 41 the same
  • 38 missing for both

Biggest differences

Each bar uses the scale of all 101 smartwatches.

  1. Water resistanceA: 10ATMB: 5ATMGalaxy Watch Ultra is 5 ATM higher.
  2. AOD battery life (up to)A: 60hB: 30hGalaxy Watch Ultra is 30 h higher.
  3. Peak brightnessA: 3,000nitsB: 2,000nitsGalaxy Watch Ultra is 1,000 nits higher.

Size, drawn to scale

Front and side.

Weight

0 to 80 g

Weight (case only)
A60.5g
B52g

All 150 fields

Every value links to where we found it.

ASamsung Galaxy Watch Ultra
BSamsung Galaxy Watch6 Classic

General

7 of 10 differ
Model numbers
Predecessor
Not available
Not available
OS updates promised
Not available
Not available
Security updates until
Not available
Not available

Case

6 of 8 differ
Back
Not available
Not available
Weight with strap
Not available
Not available

Durability

4 of 8 differ
Dive rating
Not available
Not available
Max dive depth
Not available
Not available

Display

4 of 14 differ
Pixel density
Not available
Not available
Display area
Not available
Not available
Min refresh rate
Not available
Not available
Minimum brightness
Not available
Not available

Platform

11 of 15 differ
Max CPU clock
1.6GHz
1.4GHz
Low-power coprocessor
Not available
Not available

Memory

1 of 2 differ
RAM

Health sensors

2 of 8 differ
Skin conductance (EDA)
Not available
Not available

Motion and environment sensors

0 of 9 differ
Accelerometer range
Not available
Not available
Depth gauge
Not available
Not available
Depth gauge range
Not available
Not available
Water temperature sensor
Not available
Not available

Health and fitness

3 of 5 differ
Health features
Continuous heart rate, Heart rate alerts, Irregular rhythm notifications, ECG app, Blood oxygen app, Sleep tracking, Sleep stages, Sleep apnea notifications, Stress tracking, Readiness score, Cycle tracking, Temperature-based ovulation, Body composition1Press releasenews.samsung.com/us/samsung-galaxy-watch6-series-classic-inspiring-best-self-day-night-unpacked-2023Read 23 October 2026Release: Irregular Heart Rhythm Notification checks for AFib in the background, Sleep Score and Sleep Coaching with sleep patterns, Body Composition and temperature-based cycle tracking. The ECG app and Irregular Heart Rhythm Notification are for adults 22 and older. Personalized Heart Rate Zone, Track Run and Custom Workout have no matching option and are not stored.2Owner's manualdownloadcenter.samsung.com/content/UM/202308/20230807135257904/SM-R93X_R94X_R95X_R96X_UM_Open_Android_Dut_Rev.1.0_230807.pdfRead 23 October 2026Manual contents: heart rate with high and low heart rate settings, sleep with four stages (Awake, REM, Light, Deep), snore detection, skin temperature during sleep, stress, body composition, cycle tracking with skin temperature and blood oxygen.3Maker product pageweb.archive.org/web/20231002021200/https://www.samsung.com/us/watches/galaxy-watch6-classicRead 23 October 2026Page text: Advanced Sleep Coaching with snore detection and sleep stages, skin temperature readings measured while sleeping to track the monthly period, ovulation cycle and fertility windows, heart monitoring that scans for irregular rhythm, Body Composition. Samsung Health Monitor features need a Samsung Galaxy phone.5Maker product pagesamsung.com/us/watches/galaxy-watch8-classicRead 23 October 2026Same column, Health rows listed as available: Energy Score, Sleep Apnea, Bedtime Guidance, Personalized Heart Rate Zone, ECG, Irregular Heart Rhythm Notification, Body Composition, Cycle Tracking. Not available: High Stress Alert, Running Coach, Functional Threshold Power, AGEs Index, Vascular Load, Antioxidant Index. Energy Score is stored as readiness_score. Sleep apnea and Energy Score arrived with later software and need an eligible country and Samsung phone.
Fitness features
Sport profiles
Not available
Not available
Dive modes
Not available
Not available

Safety

0 of 6 differ
Car crash detection
Not available
Not available
Emergency siren
Not available
Not available
Live location sharing
Not available
Not available
Dedicated LED flashlight
Not available
Not available

Positioning

2 of 3 differ
Offline maps
Not available
Not available

Connectivity

1 of 15 differ
4G bands
Not available
Not available
5G bands
Not available
Not available
Ultra-wideband
Not available
Not available
Satellite
Not available
Not available
ANT+
Not available
Not available

Audio

1 of 4 differ

Controls

3 of 5 differ
Gestures
Not available
Not available

Battery and charging

6 of 13 differ
Claimed battery life
Smartwatch mode (claimed)
Not available
40h
AOD battery life (up to)
60h
30h
GPS mode (claimed)
Not available
Not available
Solar charging
Not available
Not available
Charging guidance
Samsung lists Fast Charging (WPC-based wireless charging). Samsung tested with the Galaxy Watch Magnetic Fast Charging USB-C Cable (EP-OR900) and a 25 W USB-C adapter (EP-TA800) sold separately. Adapter ratings do not establish the power the watch accepts.1Press releasenews.samsung.com/us/samsung-galaxy-ring-watch7-watch-ultra-wearables-provide-intelligent-health-wellness-dataRead 10 October 2026Footnote 53 describes the charge test accessories and says the 25 W adapter is sold separately.
Max charging power (watch)
Not available
Not available
Charge 0 to 80% (claimed)
Not available
Not available
Full charge time (claimed)
Not available
Not available

Measured

4 of 4 differ
Battery tests (measured)
ASamsung Galaxy Watch Ultra
Not available

Strap

4 of 6 differ
Strap sizes
Not available
Not available

Regulatory

0 of 3 differ
SAR limb (US)
Not available
Not available
SAR limb (EU)
Not available
Not available
Other certifications
Not available
Not available

In the box

2 of 2 differ

Warranty

1 of 1 differ
Manufacturer warranty (source market)
Not available

Both are also in the API. Back to all smartwatches.