What They Have in Common
These two share nearly identical golf DNA. Both run Virtual Caddie with wind and elevation, AutoShot detection, barometer-enhanced PlaysLike distances, full-color hole maps, green contours (membership-locked on both), hazard view, strokes gained, and CT10 sensor compatibility. Both are AMOLED touchscreens with the same 43,000 preloaded courses and require the same $99.99/yr Garmin Golf membership to unlock the premium stuff.
Where They Differ
Size, Weight, and Daily Feel
The S70 42mm weighs 44g. The Fenix 8 47mm weighs 80g — nearly twice as much. That's not a spec sheet footnote; that's something you'll feel during every round. Swinging a club with 80g on your wrist is noticeably different from 44g, and I'd guess most golfers over time will prefer the lighter option. The S70 also runs a 1.2-inch screen versus the Fenix's 1.4-inch, which is a real tradeoff: less visual real estate, but a watch that doesn't dominate your wrist.
The Fenix 8 is also 1.5 inches taller (47mm case vs 42mm), with a stainless steel or titanium body that reads as a serious piece of hardware. If you want a watch that doubles as something you'd wear to a client dinner, the Fenix has that energy. The S70, with its ceramic bezel, looks polished but reads clearly as a sport watch.
Battery Life
This is the one area where the Fenix 8 isn't even close. The S70 42mm gives you 15 hours in GPS mode — enough for one to maybe two rounds before you're reaching for the charger. The Fenix 8 gives you 47 hours in GPS mode. That's three full rounds, a hiking trip, or a week of mixed use without anxiety. In watch mode, it's 16 days on the Fenix versus 10 on the S70.
If you play multiple rounds per week and hate charging mid-trip, the Fenix's battery is a genuine quality-of-life upgrade. If you charge your watch nightly anyway, the S70's 15-hour GPS window covers a round with daylight to spare.
Water Rating
The S70 is rated 5 ATM; the Fenix 8 is rated 10 ATM. For golf — including rain rounds and the occasional accidental water hazard — 5 ATM is fine. The 10 ATM matters if you're open-water swimming with it. If you're not, it's protection you're paying for and probably won't use.
Everything Beyond Golf
The Fenix 8 is a full multisport platform. Running dynamics, swim metrics, cycling power, ski mode, expedition GPS, dive profiles, and a fitness ecosystem that competes with dedicated sport watches in each category. If you train across disciplines, none of that is redundant — it's the reason the watch exists. The S70's fitness profiles are solid for a golf-first watch, but it's not built to be your running or swimming coach.
One other note: the Fenix has no listed music storage size in the spec data, while the S70 specifies 16GB. Both support music, but I'd confirm Fenix storage before assuming parity there.
Who Should Buy Which
Buy the Approach S70 (42mm) if:
- Golf is your primary sport and you want the best Garmin Golf experience without overspending
- You prefer a lighter watch (44g) that won't distract during your swing
- You charge your devices regularly and 15 hours of GPS is enough
- You want a smaller case (42mm) that wears comfortably off the course too
- Saving $450 over the Fenix matters — that's a couple of rounds of green fees, a new iron, or most of a Garmin Golf membership for four years
Buy the Fenix 8 (47mm AMOLED) if:
- You train seriously in multiple sports — running, cycling, swimming, hiking — and want one watch that covers everything
- Multi-round trips or long travel days where charging isn't easy make the 47-hour GPS battery worth it
- Open-water swimming is part of your routine and 10 ATM matters
- You want the largest, most readable AMOLED display Garmin offers in a watch that also plays golf
- The premium build — stainless steel or titanium body — matches how you want a $1,100 watch to feel
The Bottom Line
On golf features, these two watches are identical. Same courses, same Virtual Caddie, same AutoShot, same membership model. The $450 difference buys you three things on the Fenix: more battery, more water resistance, and a full multisport platform. If you need those things, the Fenix earns its price. If you don't, you're paying a premium for capabilities that stay dormant every time you tee it up. The S70 42mm is the smart pick for golfers who want Garmin's best golf tech in a watch that's actually comfortable to wear for 18 holes.
Get the Garmin Approach S70 (42mm).
See Also