The new Apple Watch Series 4 comes in different combinations of sizes, colors, and finishes. While you’re likely to select size and color based mainly on looks, your lifestyle should influence your choice of finish — aluminum or stainless steel — more. The types of metal used for the Apple Watch’s case have their own pros and cons, and we’ll discuss each of them to help you decide which one is better for you.
This Apple Watch Series 4 comes in a Gold Stainless Steel Case with Gold Milanese Loop. Featuring electrical and optical heart sensors, ECG app, and a 30% larger Retina display.
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Apple Watch Aluminum vs Stainless Steel Comparison Chart
| Model | Apple Watch Series 4 Aluminum | Apple Watch Series 4 Stainless Steel |
 |  | |
| Price | Check Price at Amazon | Check Price at Amazon |
| Weight (40mm) | 30.1g | 39.8g |
| Weight (44mm) | 36.7g | 47.9g |
| Display | Ion-X Strengthened Glass | Sapphire Crystal |
| Damage Resistance | Scratch-resistant | Shatter-resistant |
| Appearance | Matte | Glossy |
| Lifestyle (see below) | Active | Premium |
| Connectivity | GPS, GPS + Cellular | GPS + Cellular only |
Case Weight
The aluminum case is lighter; stainless steel is heavier.
Stainless steel cases for both the 40mm and 44mm models are about 10 grams, or 33%, heavier than their aluminum counterparts. Those who like wearing traditional watches will appreciate how solid the stainless steel version feels on their wrist, but those who aren’t used to the additional weight on their person will like the lighter aluminum more. Whether you prefer a lighter or heavier Apple Watch is up to you, but you can select the corresponding case if this is an important factor.
Damage Resistance
The aluminum case is more resistant to scratches, but the stainless steel case is more durable against bigger damage.
The matte finish of the aluminum case makes it less prone to tiny scratches or microabrasions. The glossy surface of the stainless steel case, however, is a bit more susceptible to such marks, and it might be noticeable after about a year of regular use. On the flip side, the stronger sapphire crystal used on the front display of the stainless steel case is actually more scratch resistant than the Ion-X strengthened glass used on the aluminum version.
Stay active, healthy and connected. This Apple Watch Series 4 comes in a Space Gray Aluminum Case with Black Sport Band. Featuring a 30% larger display, ECG app and more.
Stainless steel is a tougher egg to crack compared to aluminum, and even though you shouldn’t put that to the test, knowing it’s a bit more durable is a nice feeling to have.
Lifestyle
The aluminum case is better suited for an active lifestyle.
Although Apple aims to help people be more active and healthy with each new generation of their smartwatch, it’s safe to say that the lighter aluminum is better suited for those who like to run a lot or work out in the gym. You won’t notice its weight as much so you can focus on your exercise, although you should still take care not to scuff it against heavy equipment.
If you’re more into casual fitness and value the premium, glossy sheen of the stainless steel model, it’s definitely the better choice for flair and style.
Price
The aluminum case costs less than the stainless steel.
Apple Watches aren’t cheap wearable by any means, but the price difference between aluminum and stainless steel variations is sizable. An aluminum finish can cost up to 40% less than a stainless steel one, making it the more affordable choice. Note that the stainless steel Apple Watches only come with the GPS + Cellular models, so they’re inherently more expensive.
Verdict
Go for the aluminum case if you have an active lifestyle; pick stainless steel if you want a more premium style.
Stay active, healthy and connected. This Apple Watch Series 4 comes in a Space Gray Aluminum Case with Black Sport Band. Featuring a 30% larger display, ECG app and more.
This Apple Watch Series 4 comes in a Gold Stainless Steel Case with Gold Milanese Loop. Featuring electrical and optical heart sensors, ECG app, and a 30% larger Retina display.
The choice between the Apple Watch aluminum vs stainless steel cases should boil down to how you’re going to use it. The lightweight, sporty aluminum version is arguably better for everyday use while running and working out, and costs less to boot. On the other hand, no one can deny the premium, glossy look of a stainless steel finish, so if you’re after a solid and durable timepiece that you can still wear while swimming or surfing, this version will be more appealing.
FAQs
Each has its pros and cons. The main advantages of a stainless steel Apple Watch are durability and premium finish. It can withstand impacts better and its finish looks slightly more flashy, too. In contrast, the aluminum Apple Watch is more scratch-resistant and lightweight, plus it’s cheaper to boot. So, it really depends on your preferences, fitness tracking needs, and budget to determine which one’s better.
It’s primarily due to the materials used to build the Apple Watch stainless steel models. In particular, the stainless steel case version uses a stronger sapphire crystal for its display instead of the Ion-X strengthened glass of the aluminum version.
The most durable material used for an Apple Watch case is ceramic. It’s four times as hard as stainless steel, and it can’t be scratched or tarnished. Consequently, it’s also the most expensive Apple Watch edition.
The Ion-X glass of aluminum Apple Watches are more likely to crack if it falls face down from a great height. Otherwise, it’s much more durable than Apple iPhones in comparison. Furthermore, the sapphire crystal screen of the stainless steel versions are much tougher and are also less prone to scratch marks.