What They Have in Common
A lot. Same AMOLED display size (1.4 in), same golf app, same course database, same Virtual Caddie with wind and barometric elevation, same AutoShot detection, same CT10 sensor compatibility, same green contours (membership-locked on both), same PlaysLike math, same USB-C charging. From a pure golf standpoint, these two watches are effectively identical on paper.
Where They Differ
Price and What That Gap Actually Buys
The S70 is $699.99. The Fenix 8 starts at $1,099.99 — and that's the base stainless steel variant; titanium runs higher. That's a $400 spread between two watches with the same golf feature set. What you're paying for isn't better golf data — it's a different kind of body and a dramatically different battery.
Battery Life
This is the real differentiator. The S70 gets 20 hours in GPS mode. The Fenix 8 gets 47 hours in GPS-only mode, dropping to 38 hours with all satellite systems active. For a standard round of golf (4-5 hours), neither watch will die on you. But if you're hiking all day, running a marathon, or doing back-to-back rounds on a golf trip without reliable charging access, the Fenix 8's battery math is completely different. The S70's 20-hour GPS limit means you'd want to charge it every night on a multi-day trip. The Fenix 8 is genuinely multi-day without stress.
Weight and Water Resistance
The Fenix 8 weighs 80g (stainless with band); the S70 is 56g. That's not a small difference — 24 grams is noticeable on your wrist, especially mid-swing. The S70 is the lighter watch. The Fenix 8's titanium version drops to 73g, which narrows the gap but doesn't close it, and costs more than the base stainless. On water resistance, the Fenix 8 is rated 10 ATM versus the S70's 5 ATM. Five ATM is fine for rain and the occasional water hazard splash. Ten ATM means you can swim laps with it on. If you're a triathlete using the watch for open-water swimming, that matters. If you're a golfer who occasionally gets caught in a downpour, 5 ATM is enough.
Multisport Features
The Fenix 8 is Garmin's flagship multisport watch. It has activity profiles for running, cycling, swimming, hiking, skiing, climbing — the full catalog. The S70 has fitness profiles too, but it's built primarily around golf with health monitoring layered on. My read is that most golfers who also jog a few times a week won't miss what the Fenix 8 adds. But if triathlon training or ultra-distance events are part of your life, the Fenix 8 is a different tool entirely.
What's Actually Identical
Worth repeating: Virtual Caddie, wind data, PlaysLike with barometer, AutoShot, green contours, hazard view, full-color hole maps, strokes gained, PinPointer, Garmin Pay, music storage, smart notifications. Both run Garmin Golf and Garmin Connect. Both need a $99.99/yr membership to unlock green contours and enhanced maps. Neither includes CT10 club sensors in the box — those are sold separately either way.
Who Should Buy Which
Get the Approach S70 if:
- Golf is your primary sport and you want the best golf watch Garmin makes without paying for multisport overhead
- You prefer a lighter watch on the course (56g vs 80g is real over 18 holes)
- You charge your watch every couple of days and 20 GPS hours is plenty
- You want 5 ATM water resistance, which is all you need for golf in any weather
- $700 feels like the right ceiling for a golf watch
Get the Fenix 8 if:
- You train seriously outside of golf — running, cycling, swimming, hiking — and want one watch for everything
- You go on multi-day golf trips and don't want to think about charging
- You swim and need 10 ATM rating
- You race triathlons or do endurance events where the Fenix 8's multisport tracking actually earns its cost
- You want the titanium version and the weight reduction that comes with it
The Bottom Line
Three years of Garmin Golf membership costs the same either way — $299.97 at $99.99/yr. The watches themselves are $400 apart. If you play golf and otherwise live a normal active life, that $400 premium is paying for battery life and water resistance you probably won't fully use. The S70 is the smarter golf purchase. The Fenix 8 makes sense if it's genuinely replacing multiple sport-specific watches or if the 47-hour GPS battery solves a real problem in your life.
Get the Approach S70.
See Also