The Quick Verdict
Get the Nikon COOLSHOT 20i GIII. It's $40 more than the NX9 Slope, but you get better optics tech, a significantly lighter unit, a five-year warranty, and — honestly — a rangefinder that feels like a precision instrument rather than a utility device. The Precision Pro NX9 Slope is worth a look if the lifetime battery replacement program is a genuine priority for you and you don't mind carrying something heavier. Check price at Amazon →
What They Have in Common
Both are slope-capable rangefinders with a legal tournament mode, 6x magnification, and ±1 yard accuracy. They're in the same tier, aimed at the same golfer, and neither is going to embarrass you on the course. If your main question is "will it get me a reliable yardage to the flag," both answer yes.
Where They Differ
Weight and Feel in the Hand
This is the gap that surprised me most looking at these two side by side. The COOLSHOT 20i GIII weighs 4.6 oz. The NX9 Slope weighs 10 oz — more than twice as much. That's not a minor spec difference; that's the difference between something you barely notice in your pocket and something that actually has heft to it. If you're walking 18 on a warm day or keeping a rangefinder in a cart bag pocket, that matters more than it might sound. Nikon's multilayer lens coating also puts it ahead optically — you'll notice the difference in clarity in low light or when you're reading a flag against a dark treeline.
Slope Implementation
Both units do slope and both have a switch to turn it off for tournament play. You'll toggle it off before your round, and there's roughly a 60% chance you'll forget to toggle it back on afterward. That part's the same wherever you buy. Where they differ: Nikon calls theirs "ID Slope" and Precision Pro calls theirs "Adaptive Slope." The NX9 claims adaptive slope adjusts for more conditions — probably atmospheric or elevation-based refinements — but neither the spec sheet nor Precision Pro spells out exactly what that means in measurable terms. Nikon's implementation is well-established and reliable; I'd call the Adaptive Slope claim marketing language until someone shows me real data.
Battery Setup
Here's where Precision Pro makes a genuinely interesting play. The NX9 Slope comes with a lifetime battery replacement program — meaning if the battery dies, they replace it. The COOLSHOT 20i GIII runs on a CR2 lithium, which you can find at any drugstore or gas station. Both approaches solve the same problem differently. The CR2 is more immediate: you're mid-round, battery dies, you drive to the nearest CVS and you're back in business. The lifetime program is more long-term: you never pay for another battery, but you're waiting on shipping. CR2 batteries are cheap and everywhere, which is worth something when you're standing in a parking lot before a tee time.
Warranty and Brand Backing
Nikon offers a five-year warranty. Precision Pro offers two years. That's a straightforward difference. Precision Pro has built a reputation on customer service and backing their products, and that's real — but a five-year warranty from an optics company with Nikon's track record is hard to argue with.
Who Should Buy Which
Get the Nikon COOLSHOT 20i GIII if:
- You walk your rounds and want a rangefinder you'll genuinely forget is in your pocket — 4.6 oz is almost nothing
- You care about optical quality and want multilayer-coated lenses that hold up in low light, early morning, or under a cloudy sky
- You want the longer warranty and brand backing from a company that's been building optics for decades
- You've been burned by batteries at inopportune moments — CR2s are everywhere, and that's not a small thing
Get the Precision Pro NX9 Slope if:
- You hate thinking about batteries entirely and want one less thing to manage over the life of the device
- You're the golfer who uses a magnetic cart mount constantly and the NX9's built-in magnet is a genuine daily convenience
- $40 is a real number to you right now and the NX9 checks every other box
The Bottom Line
These are same-tier rangefinders at a $40 spread, and the Nikon earns that gap. The weight difference alone would tip it for me — the COOLSHOT 20i GIII is almost half the weight, and you will notice that over a walking round. Add the better optics pedigree, the five-year warranty, and the practical utility of CR2 batteries, and the Nikon is the cleaner buy. The NX9's lifetime battery program and magnetic mount are real features, not gimmicks, but they don't close the gap.