I can say that each of these two has got a very remarkable design that’s attractive, elegant and stylish. Each of these two is also sturdily built with some of the most durable materials in the industry.

Galaxy Watch 3 retains the round shape just like most smartwatches from Samsung, while Watch 5 is rectangular in shape. As a result, Watch 5 looks geeky compared to a classic Galaxy Watch 3 that looks like a traditional watch.

Despite having larger display, Watch 5 is more compact and at 10.9mm is also slimmer than Galaxy Watch 3. It also weighs a little less, although these two are lightweight.

Watch 5 has a larger 1.78 inches display compared to 1.4 inches of Galaxy Watch 3. Both smartwatches offer touchscreen support and physical buttons for easy navigation, but while Galaxy Watch 3 has a physical rotating bezel, Watch 5 has a digital rotating crown, both technologies make navigating these watches very easy.

Both smartwatches offer tonnes of watch faces to choose from as well as the ability to download apps on the watch.
Both smartwatches are also rated 5ATM which makes any of these two safe to wear to the pool.

Watch 5 packs more storage capacity than Galaxy Watch 3. While it has 32GB on all models, you get 8GB from Galaxy Watch 3.

Each of these two has a microphone and loudspeaker and can make calls via Bluetooth calling or independently with the LTE models. While Bixby is the Voice Assistant on Galaxy Watch 3, its Siri for Watch 5. You decide which is more intelligent. Personally, I think Siri is more intelligent.

Both Watch 5 and Galaxy Watch 3 are marketed as fitness-focused devices that can help you reach more fitness goals. Both smartwatches will track all the basics like most smartwatches such as heart rate monitoring, calories, floors climbed, stress, menstrual cycle tracking with inbuilt GPS that enables outdoor activity tracking. These two also offer preset workout modes to choose from.

Trip detection feature that can call emergency contacts when the watch detects a fall has been present on Watch 5, and is now available on Galaxy Watch 3. So also is ECG tracking that can detect irregular heart rhythms and can help you prevent atrial fibrillation.

However, Galaxy Watch 3 features blood pressure monitoring and blood oxygen tracking which Watch 5 relies on third-party apps to achieve. Moreover, blood oxygen tracking isn’t yet available on Watch 5. Galaxy Watch 3 also features in-depth sleep tracking unlike Watch 5 that relies on third-party apps to track your sleep.

The bottom line, I think Galaxy Watch 3 is a more comprehensive fitness tracker than Watch 5. Hopefully, the expected Watch 6 will fill in the gap.

Despite sacrificing battery life as a result of lower battery capacity due to its slimmer and more compact design, Galaxy Watch 3 still has a longer battery life than Watch 5. With Galaxy Watch 3 you can get up to 2 days long battery life compared to Watch 5 that can barely last a day, about 15hrs.