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Apple Watch Comparison Guide: Series 6 to Ultra 2 (SE Included!)

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?

If You Want...

Best value on a feature-rich watch

Budget-friendly with essentials

Cutting-edge tech + durability

Great performance + affordability

Full health suite (ECG, Blood Oxygen)
Go For

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.

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