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Apple Watch Comparison Guide: Series 6 to Ultra 2 (SE Included!)
Thinking about upgrading your Apple Watch but confused by all the different models—Series 6, Series 7, Series 8, Series 9, Series 10, SE, and Ultra? You're not alone.
Each new Apple Watch introduces powerful features like crash detection, temperature sensors, and brighter displays. But which one offers the best value? Should you go for the budget-friendly SE, the feature-packed Series 10, or the rugged Ultra?
At Cellmigo, we help you save big on refurbished Apple Watches—so you can get the tech you need without paying full price. Let’s break down all models released since Apple Watch Series 6, so you can choose the perfect fit for your lifestyle and budget.
From performance to sensors, we’re diving into the specs and features that differentiate each Apple Watch model—so you can pick the smartest option.
Apple Watch Series 6 to 10
|
Feature |
Series 6 |
Series 7 |
Series 8 |
Series 9 |
Series 10 |
|
Release Year |
2020 |
2021 |
2022 |
2023 |
2024 |
|
Display Size |
40mm / 44mm |
41mm / 45mm |
41mm / 45mm |
41mm / 45mm |
42mm / 46mm |
|
Case Material |
Aluminum, Stainless Steel |
Aluminum, Stainless Steel |
Aluminum, Stainless Steel |
Aluminum, Stainless Steel |
Aluminum, Titanium |
|
Display Type |
Retina LTPO OLED |
Always-On Retina |
Always-On Retina |
Always-On Retina |
Always-On Retina |
|
Brightness |
1000 nits |
1000 nits |
1000 nits |
2000 nits |
2000 nits |
|
Processor |
S6 SiP |
S7 SiP |
S8 SiP |
S9 SiP |
S10 SiP |
|
Sensors |
Blood Oxygen, ECG, Heart Rate |
Same + crack-resistant front |
+ Temp sensor, Crash Detection |
Double Tap, Siri on-device |
Double Tap, Siri on-device |
|
Health Sensors |
HR, ECG, SpO2 |
HR, ECG, SpO2 |
+ Temp Sensor |
+ Temp Sensor |
+ Temp Sensor |
|
Blood Oxygen / ECG |
✅ |
✅ |
✅ |
✅ |
✅ |
|
Crash Detection |
❌ |
❌ |
✅ |
✅ |
✅ |
|
Battery Life |
Up to 18 hrs |
Up to 18 hrs |
Up to 18 hrs |
Up to 18 hrs |
Up to 18 hrs |
Apple Watch SE Models (Budget-Friendly Option)
|
Feature |
SE (2020) |
SE (2022) |
|
Release Year |
2020 |
2022 |
|
Display Size |
40mm / 44mm |
40mm / 44mm |
|
Case Material |
Aluminum only |
Aluminum only |
|
Display Type |
Retina |
Retina |
|
Display Brightness |
1000 nits |
1000 nits |
|
Always-On Display |
❌ |
❌ |
|
Processor |
S5 SiP |
S8 SiP |
|
Health Sensors |
❌ |
✅ |
|
Blood Oxygen / ECG |
Heart Rate only |
Heart Rate only |
|
Crash Detection |
❌ |
✅ |
|
Battery Life |
Up to 18 hrs |
Up to 18 hrs |
Apple Watch Ultra Models (Premium & Rugged)
|
Feature |
Ultra (2022) |
Ultra 2 (2023) |
|
Release Year |
2022 |
2023 |
|
Display Size |
49mm |
49mm |
|
Case Material |
Titanium only |
Titanium only |
|
Display Type |
Always-On Retina LTPO OLED |
Always-On Retina LTPO OLED |
|
Display Brightness |
2000 nits |
3000 nits |
|
Processor |
S8 SiP |
S9 SiP |
|
Health Sensors |
Heart Rate, Temp Sensor, SpO2 (Blood Oxygen), ECG |
Heart Rate, Temp Sensor, SpO2, ECG |
|
Blood Oxygen / ECG |
✅ |
✅ |
|
Special Features |
Dual-Frequency GPS, Dive Ready, Action Button, Apple Intelligence |
+ Double Tap, brighter display |
|
Crash Detection |
✅ |
✅ |
|
Battery Life |
Up to 36 hrs |
Up to 36 hrs |
🧠 Why Case Material Matters
When choosing an Apple Watch, the case material you select—Aluminum, Stainless Steel, or Titanium—can significantly impact the look, feel, durability, and price of the device. Each material brings its own strengths and trade-offs, from lightweight practicality to premium luxury finishes. The comparison table below breaks down the key differences between these case types, helping you decide which version best fits your lifestyle, priorities, and budget.
|
Case Material |
Used In |
Pros |
Cons |
Aluminum |
SE, Series 6 - 10 |
Lightweight, Affordable |
Scratches easier |
Stainless Steel |
Series 6 - 9 |
Premium look, More durable |
Heavier, More expensive |
Titanium |
Series 10, Ultra, Ultra 2 |
Strongest, Lightest for its size |
Only in Series 10 & Ultra models |
✅ Which One Should You Choose?
Best value on a feature-rich watch
Budget-friendly with essentials
Cutting-edge tech + durability
Great performance + affordability
Full health suite (ECG, Blood Oxygen)
Apple Watch Series 7 or 8
Apple Watch SE (2022)
Apple Watch Ultra 2
Refurbished Series 6 or 7
Apple Watch Series 8 or 9
Why Buy a Refurbished Apple Watch from Cellmigo?
💰 Save up to 40% off retail
🔧 Fully tested and certified
✅ Warranty included
♻️ Eco-friendly and sustainable choice
Final Thoughts: Which Apple Watch Is Right for You?
Choosing the right Apple Watch comes down to your lifestyle, health needs, and budget. Whether you're eyeing the rugged Apple Watch Ultra, the feature-rich Series 10, or the budget-friendly SE, there's a perfect fit for everyone.
And the best part? You don’t need to pay full price. At Cellmigo, we offer certified refurbished Apple Watches at up to 40% off retail — with full functionality, warranty, and peace of mind. Whether you're upgrading or buying your first Apple Watch, Cellmigo makes premium wearable tech more accessible than ever.
Frequently Asked Questions (FAQ)
❓1. Can I use a refurbished Apple Watch with the latest iPhone?
Absolutely. All Apple Watches from Series 6 and later, including SE and Ultra models, are compatible with the latest iPhones. Just make sure your iPhone is updated to the latest iOS version.
❓2. Do refurbished Apple Watches come with a warranty at Cellmigo?
Yes! All refurbished Apple Watches at Cellmigo are tested, certified, and come with a limited warranty. You get great value without compromising on quality or peace of mind.
❓3. What's the difference between Apple Watch Series and SE models?
Apple Watch SE models are more affordable and include essential features like heart rate tracking and fitness monitoring, but they lack advanced sensors like ECG, Blood Oxygen, and Always-On Display found in Series 6–10 watches.
❓4. Is the Apple Watch Ultra worth it?
If you need longer battery life, rugged durability, and advanced features like dual-frequency GPS and dive tracking, then Apple Watch Ultra or Ultra 2 is a great investment — especially when bought refurbished at Cellmigo.
❓5. What's the most budget-friendly Apple Watch with crash detection?
The Apple Watch SE (2nd Gen, 2022) is the most affordable model that includes crash detection. It also features the same S8 chip used in Series 8, making it a great entry-level option for everyday use.
❓6. Which Apple Watch has the best battery life?
The Apple Watch Ultra and Ultra 2 lead the pack with up to 36 hours of battery life. All other models (Series and SE) offer up to 18 hours, with fast charging available in Series 7 and newer.


