The Quick Verdict
Get the Nikon COOLSHOT 20i GIII. At $239.95 versus $199.99, the $40 price gap is close enough that the GIII's superior build quality, lighter weight, five-year warranty, and Nikon's optics reputation more than justify it. The Shot Scope PRO X only makes sense if you specifically want a customizable faceplate look and a magnet mount built in — useful features, but not enough to flip the decision. Check price at Amazon →
What They Have in Common
Both are 6x rangefinders with slope mode, slope switch for tournament compliance, and 800-yard maximum range. Both claim ±1-yard accuracy. Both are water-resistant enough for a normal round in the rain. That's a solid shared baseline — these are doing the same fundamental job on the course.
Where They Differ
Weight and Ergonomics
This one isn't close. The GIII weighs 4.6 oz (130g). The PRO X weighs 230g — nearly twice as much. That matters more than it sounds: a rangefinder lives in your hand or your pocket between shots, and you'll feel 230g by the back nine. The GIII's dimensions (91 × 73 × 37 mm) are also compact enough to drop in a shorts pocket without thinking about it. Shot Scope doesn't publish the PRO X's dimensions, which is a mild red flag — my guess is they'd look less flattering next to the GIII's numbers.
Optics and Display
Nikon's multilayer lens coating is a real differentiator. Nikon builds camera glass for a living, and that carries over into their rangefinders — the image through the COOLSHOT line tends to be cleaner and brighter than you'd expect at this price. The GIII's internal display also keeps the optics clean; there's nothing to scratch or degrade on the outside. The PRO X uses an LCD display, which works fine in most conditions but can wash out in bright sun. Nobody reads a rangefinder in direct sunlight — they read it in the shade of their palm — but even then, an internal display is one fewer variable.
The GIII also includes an 8-second scan mode, which is genuinely useful when you're ranging multiple targets on a layup hole or trying to pick out a specific flag position. Shot Scope doesn't list an equivalent.
Locked-On-Quake and Slope
Nikon's "Locked-On-Quake" is their vibration confirmation system — you get a pulse when the rangefinder locks. It's a small thing that becomes a big thing once you've used it, because you stop second-guessing whether you grabbed the flag or the tree behind it. The GIII also uses ID-Slope, which gives you slope-adjusted yardage. The PRO X uses "Adaptive Slope," which is Shot Scope's version of the same concept. Both slope implementations do the job; neither has a clear spec advantage here.
Warranty and Long-Term Value
Five years versus two years. On a $40 price gap, this is probably the clearest argument for the Nikon. Rangefinders live in bag pockets, get dropped, get rained on, and get sat on. A five-year warranty means Nikon is backing this for a long time — and it suggests they're confident in the build. Shot Scope's two-year coverage is fine but unremarkable.
The PRO X's One Genuine Edge
Magnet mount. The PRO X has a strong built-in magnet, which means it snaps to the cart rail or your bag strap without a case or a carabiner clip. If you ride a cart and want grab-and-go access without fumbling with pouches, that's legitimately useful. The customizable faceplates are more of a cosmetic thing — a fun touch, not a functional one.
Who Should Buy Which
Get the Nikon COOLSHOT 20i GIII if:
- You want something light enough to forget about between shots — 4.6 oz disappears in a pocket
- You walk the course and carry your bag; the weight difference is real over 18 holes
- You're thinking five years ahead and want a warranty that reflects that
- You care about optics quality and want Nikon's glass doing the heavy lifting
Get the Shot Scope PRO X if:
- You always ride a cart and a magnetic mount genuinely changes how you use a rangefinder — snap it on, grab it, done
- You want to swap faceplates and personalize the look (it's a real feature, even if it's not a performance one)
- You're buying on a tighter budget and the $40 savings matter more to you than the warranty gap
The Bottom Line
These are adjacent-tier products at a $40 gap, and the gap actually undersells how different they are. The GIII is lighter, has better optics pedigree, includes vibration confirmation, and backs everything with a five-year warranty. The PRO X is heavier, shorter-warranted, and less proven — its magnet mount is nice but doesn't close that gap. Spend the $40.