Watch Series 4 40mm vs Watch Series 6 44mm

Swappasaurus says...
Apple released the Watch Series 4 on September 21, 2018, and released the Watch Series 6 on September 18, 2020. The Series 4 and Series 6 watches are available in 40mm and 44mm case sizes. The Apple Watch Series 6 brought new features such as new case finishes, watchOS 7, and a Blood Oxygen sensor and app. The Apple Watch Series 4 is powered by an S4 SiP with a 64-bit dual-core processor, a W3 Apple wireless chip, and 16GB of storage. The Apple Watch Series 6 is powered by an S6 SiP with a 64-bit dual-core processor, a W3 Apple wireless chip, a U1 ultra-wideband chip, and 32GB of storage.
Price Comparison
Watch Series 4 40mm vs Watch Series 6 44mm Pricing
Specs Comparison
The Apple Watch Series 4 specs include a Retina display, an S4 SiP with a 64-bit dual-core processor, a W3 wireless chip, an altimeter, and 16GB of storage space.
And, to compare, the Apple Watch Series 6 specs include an always-on Retina display, an S6 SiP with a 64-bit dual-core processor, a W3 wireless chip, a U1 ultra wideband chip, an always-on altimeter, and 32GB of storage space.
Key differences between the Series 4 and Series 6 watches include the always-on Retina display, Compass, International Emergency calling, blood oxygen sensor, and U1 chip, which are all found on the Series 6.
Common specs that are shared between the Apple Watch Series 4 and the Apple Watch Series 6 include a Digital Crown with haptic feedback, a built-in speaker and microphone, water resistance to 50 meters, WiFi (802.11b/g/n), Bluetooth 5.0, an electrical heart sensor, optical heart sensor, high and low heart rate notifications, irregular rhythm notification, an ECG app, Emergency SOS, Fall Detection, and GPS/GNSS.
The 40mm Apple Watch Series 4 measures 40mm (H) x 34mm (W) x 10.7mm (D), and the 44mm Apple Watch Series 6 measures 44mm (H) x 38mm (W) x 10.7mm (D).
The weights of the Series 4 and Series 6 Apple Watch vary based on the case material.
The 40mm Apple Watch Series 4 weights are as follows: the stainless steel model weighs 39.8 grams, and the aluminum model weighs 30.1 grams.
The 44mm Apple Watch Series 6 weights are as follows: the stainless steel model weighs 47.1 grams, the aluminum model weighs 36.5 grams, and the titanium model weighs 41.3 grams.
Color Choices
Watch Series 4 40mm
Available in 4 colors:
-
Black
-
Gold
-
Gray
-
Silver
Watch Series 6 44mm
Available in 8 colors:
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Black
-
Blue
-
Gold
-
Graphite
-
Gray
-
Red
-
Silver
-
Titanium
Watch Series 4 40mm vs Watch Series 6 44mm Colors

The Apple Watch Series 4 is available in stainless steel and aluminum, and the Apple Watch Series 6 is available in stainless steel, aluminum, and titanium.
The stainless steel and aluminum Apple Watch Series 4 are available in Silver and Gold.
The stainless steel Apple Watch Series 4 is also available in Space Black, and the aluminum Series 4 is also available in Space Gray.
The stainless steel Apple Watch Series 6 is available in Silver, Graphite, and Gold, the aluminum Series 6 is available in Silver, Space Gray, Gold, Blue, and PRODUCT(RED), and the titanium Series 6 is available in Titanium and Space Black.
Storage Options
Watch Series 6 44mm
Choose from 0 storage options:
Watch Series 4 40mm vs Watch Series 6 44mm Storage

The Apple Watch Series 4 is available with 16GB of storage space, and the Apple Watch Series 6 is available with 32GB of storage space.
Watch Series 4 40mm vs Watch Series 6 44mm Reviews
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