I got the Venu over the Vivoactive 4 simply because of the display. I personally didnt see any notable differences between the two models. if you are looking for detailed differences you should compare the specs between the two. The only thing i can see a difference in is the battery life/display. Based on over a month of usage, on average i get a solid 6-7 days of regular usage.
From the manufacturer
GPS Smartwatch with a Bright, Beautiful Display Built for the Active Lifestyle
- Watch case size 43mm; Fits wrists with a circumference of 125-190 mmAMOLED display and up to 5-day battery life in smartwatch mode; up to 6 hours in GPS mode with musicKeep an eye on your health 24/7 with the broadest available range of all-day health monitoring featuresEasily download music to your watch for phone-free listeningRecord all the ways to move with more than 20 preloaded GPS and indoor sports appsGet easy-to-follow, animated workouts right on your watch screen
Body Battery Energy Monitoring
See your body’s energy levels throughout the day, so you can find the best times for activity and rest.
Receive emails, texts and alerts right on your watch when paired with a compatible smartphone. You can even respond to texts if you have an Android phone.
Easily download songs to your watch, including playlists from your Spotify, Deezer or Amazon Music accounts (subscription may be required). Connect with wireless headphones (sold separately) for phone-free listening.
Safety and Tracking Features
While your watch and phone are paired, your location can be sent to your contacts either manually or — during outdoor activities — automatically with built-in incident detection (when paired to a compatible smartphone), if needed.
Breeze through checkout lines with Garmin Pay contactless payment solution through participating providers (not all countries and payment networks are eligible).
Connect IQ Store
Add personality to your watch by downloading apps, widgets, watch faces and more. It’s easy and — even better — it’s free.
Animated Workouts and Garmin Coach
Get a personal running coach on your wrist, for free, to help you train for your next 5K, 10K or half-marathon.
Easy-to-follow, animated cardio, strength, yoga and Pilates workouts come preloaded on the watch, and you can download more from the Garmin Connect app.
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Garmin 010-02173-11 Venu, GPS Smartwatch with Bright Touchscreen Display, Features Music, Body Energy Monitoring, Animated Workouts, Pulse Ox Sensor and More, Black,Garmin,010-02173-11