Let’s cut straight to the chase.
In other words, they share far more similarities than differences. So for this article, we will unpack all the key similarities, and all the key differences, to give you a well-rounded overview of what these watches can do.
Features Limited to Forerunner 945
Better Measurement of Human Body - Forerunner 945 Only
The Forerunner 945 uses the following features to better measure important health metrics:
- Slightly improved HRM with new wrist-based HRM
- Pulse Ox Sensor to monitor blood oxygen saturation levels
- Stress Tracking
- Advanced Sleep Monitoring
- Altitude Acclimation
Even though the Fenix 5X Plus also has a Pulse Oximeter, it isn’t leveraged in the same way that the oximeter is used in the Forerunner 945.
Garmin have capitilized on technology that was only introduced into the Garmin Marq series (released in March 2019), and packed into the FR945.
The end result is that the Forerunner 945 is better at measuring your heart rate, blood oxygen saturation levels, stress levels, sleep quality and training load.
For serious athletes then, going for the Forerunner 945 is basically a no-brainer.
Training Focus Metrics - Forerunner 945 Only
Training load is nothing new, and it is found in the Fenix 5 Plus and the FR945. But training load focus is a new feature. This is Garmin’s summary of what it does:
“Training load focus sorts your recent training history into different categories based on activity structure and intensity“
So basically, it’s an upgraded version of training load, with categorical breakdowns that make the information more useful and easier to understand.
Better Battery Life - Forerunner 945
By shifting to Sony’s GPS chips, Garmin have unlocked some serious wins in terms of battery life. The easiest way to verify this is by looking at GPS battery life of each watch.
- Forerunner 945 GPS Battery Life – 36 Hours
- Garmin Fenix 5 Plus GPS Battery Life – 18 Hours
As you can see from the bullet points above, the GPS battery life of the FR945 is literally double that of the Fenix 5 Plus. Garmin’s decision to move to Sony’s GPS chips has clearly paid off.
Forerunner 945See Price
Fenix 5 PlusSee Price
With the Forerunner 945, Garmin have created arguably the best multisport GPS watch that has ever been made.
You get all of the technology packed into the Fenix 5 Plus, and on top of that, new and improved training load focus metrics which give you a more complete understanding of the physical state of your body.