The Quick Verdict
If you're choosing one or the other, the ULT-S rangefinder is the better single device here. The ULT-G is a fine little watch for what it costs, but at ~$110, it's a budget GPS with no color screen, no hole maps, and no green view. The ULT-S gives you ±1 yard precision to any target on the course, OIS stabilization, slope mode, and it runs on a CR123 battery you'll replace twice a year. If your goal is accurate distance information, the rangefinder does it better. That said, these two aren't fighting over the same job — and if you catch the ULT-S anywhere near its Amazon street price, getting both is genuinely worth considering.
What They Actually Do
The ULT-G is a wrist-worn GPS that auto-loads your course and shows you front, middle, and back distances to the green, plus coded hazard distances. The ULT-S is a handheld laser rangefinder — you point it at a flag or tree or bunker edge, press a button, and it tells you the exact distance. Both are legal in tournament play (the ULT-S has a physical slope switch to disable slope). Both are TecTecTec products, though they don't share an app or sync data between them.
The Real Tradeoffs
Precision vs. convenience
The ULT-S wins on accuracy. It'll give you distance to the flag — or any other target — to within a yard. The ULT-G gives you front/middle/back, which is ±3-5 yards to a fixed point on the green. For a tucked back-left pin on a long approach, that difference matters. For a tee shot where you're just trying to decide between a 3-wood and a hybrid, the watch is plenty good enough — and you never have to raise anything to your eye.
Speed of use
On a busy Saturday with foursomes stacking up behind you, the watch wins by a mile. Glance at your wrist, see 164 to the middle, grab your club. Done. The rangefinder means pulling it out of your bag or pocket, raising it, locating the flag through the monocular, pressing the button, reading the number, putting it away. That's 15-20 seconds you don't always have. It's worth it when you need it — not worth it when you don't.
What you see before you hit
This is where the watch does something the rangefinder simply can't do. You're on a tee box you've never played — 390-yard dogleg right with a bunker cutting into the fairway at 240. The ULT-G shows you hazard distances with coded abbreviations (RGB = right greenside bunker, that kind of thing). You know the safe landing zone. You pick your line. The ULT-S can measure the distance to that bunker lip — but only if you can see it clearly enough to range it. Course layout information lives entirely in the GPS device. A rangefinder shows you nothing until you point it at something.
Information depth
The ULT-G is a budget watch, so don't expect full hole maps or green shape overlays — you won't get them. It's F/M/B distances, hazard yardages, manual shot tracking, and scoring. That's the feature set. The ULT-S does exactly one thing: tell you the distance to what you're pointing at, with slope compensation if you want it. One number, very accurately. Neither device is trying to be your swing coach.
The one feature the other can never have
A GPS watch will never tell you the exact distance to the branch hanging over the left side of the fairway 220 yards out, or to the specific edge of a bunker you're trying to carry. That's rangefinder territory, full stop. A rangefinder will never show you where the hazards are before you can even see them. Both statements are permanent — they're category limits, not product limits.
Battery and maintenance
The ULT-G gets roughly 2.5 rounds per charge on a proprietary USB clip. Plan to plug it in every couple of rounds. The ULT-S runs on a CR123 lithium battery that'll last you dozens of rounds before it even thinks about dying. If you're the golfer who forgets to charge things, the rangefinder is lower-maintenance by a wide margin.
Cost of ownership
The ULT-G runs about $110 with no subscription required — that's a real advantage over GPS watches that charge $50-100/year for course data. The ULT-S has an MSRP of $279, though it's been spotted on Amazon considerably lower than that. Either way, neither device has ongoing costs once you own it. Over three years, both are relatively affordable to run.
Who Should Get Which
Get the ULT-G if: You want a set-it-and-forget-it device on your wrist that handles distances automatically. You play a variety of courses and want hazard information before you can even see the trouble. You don't want to learn the "find the flag" skill with a rangefinder, and you don't want to charge another dedicated device after every round. For a golfer just starting to use distance tech, this is the easier onramp.
Get the ULT-S if: You want accurate distance to the pin, period. You play familiar courses where you already know the layout and mostly need confirmation yardages on approach shots. You'd rather have one precise number than a small dashboard of approximate ones. You also don't want to think about charging — swap a CR123 in once in a while and you're done.
Get both if: The ULT-S is available anywhere near its Amazon street price. Pairing a $90-100 rangefinder with a $110 GPS watch gives you genuinely different tools for different moments in a round. The watch handles course navigation, hazard awareness, and tee-shot decisions. The rangefinder closes out your approach with a real pin number. That's a $200 total setup that covers most of what a $500 premium GPS device tries to do — and does the pin-precision part better.
The Bottom Line
The ULT-S does its one job better than the ULT-G does its many jobs. If you're picking one, grab the rangefinder. But if the street price lines up, the honest answer is that these two make more sense together than apart.
ULT-S for the exact number. ULT-G for everything else. Both if you can swing it.