What They Have in Common
Both use Voice Caddie's V-Algorithm slope calculation, both offer a pin-tracer mode for flagging, and both land at ±1 yard accuracy with 6x magnification and 1,000-yard max range. They're both water-resistant. So you're not trading down on core laser performance if you go with the L6 — the fundamental distance-measuring engine is the same.
Where They Differ
Display and Interface
The L6 has an OLED display — clean, high-contrast, reads well in most conditions. The SL3 has a color OLED touchscreen. That's a bigger deal than it sounds. With the SL3 you're not just reading a number; you're interacting with a map of the hole, navigating green undulation contours, and scrolling through putt data. It works more like a GPS watch than a traditional rangefinder. If you want that, it's genuinely useful. If you don't, it's a lot of interface to manage between shots when you just want to know how far to the stick.
GPS Layer and Course Data
This is the real separation. The SL3 is a hybrid GPS-laser, meaning it pulls course maps in addition to firing a laser. That gives you hazard distances, layup yardages, and — most unusually — a putt-view feature with green undulation data. For golfers who want to know about the false front or the ridge running through the back portion of the green, that's genuinely useful information that a pure laser can't give you. The L6 doesn't do any of this. Point it at a flag, get a number, move on.
Battery and Charging
The SL3 is rechargeable with published battery life — 20 hours in GPS mode, 45 hours in laser mode. That's meaningful. You charge it at home and you're done; no mid-trip scrambling for batteries. The L6's battery situation isn't published, so I can't tell you what it takes or how long it lasts. Most rangefinders in this price range run on a CR2 battery, which is available at pretty much any pharmacy, but that's a guess on my part — Voice Caddie doesn't say. Worth asking before you buy if it matters to you.
Price
Four hundred dollars is a real number. The $70 you save going with the L6 over a mid-tier competitor is one sleeve of Pro V1s. The $400 you save going with the L6 over the SL3 is more like a new driver fitting, or a season of range balls, or several months of greens fees depending on where you play. You have to actually want what the SL3 adds — the GPS layer, the green reads, the touchscreen — to justify that gap. If you just want slope and laser distance, the L6 gives you that at a third of the price.
Who Should Buy Which
Get the Voice Caddie L6 if:
- You want a dependable laser rangefinder with slope and don't need course mapping or green data
- You're the golfer who plays a regular rotation of courses and already knows the layouts — you just want confirmed yardages to the pin
- You're buying your first quality rangefinder and want to spend $200 rather than $600 while you figure out what features you actually use
- You want something you can grab, point, shoot, and put back in your bag without navigating a touchscreen
Get the Voice Caddie SL3 if:
- You actively want GPS hole maps and hazard distances alongside your laser — you play new courses often, or you just prefer having the full picture of a hole on your display
- You're the golfer who stands on the tee of an unfamiliar par-5 and wants to know where the fairway bunker ends before you pull a club, not just how far the flag is
- Green undulation and putt-read data are genuinely part of how you prep on the putting surface — this is a niche use but the SL3 is one of the few rangefinders that attempts it
- You prefer a rechargeable device and don't want to think about batteries
The Bottom Line
If you're choosing between these two, the question isn't really which is better — it's whether you want a rangefinder or a hybrid GPS-laser device with course intelligence. The L6 does the core job well and costs $200. The SL3 does considerably more and costs $600. For most golfers who play familiar courses and want quick, accurate yardages with slope, the L6 is plenty. The SL3's extras are real, but they're also $400 worth of extras that a lot of golfers will under-use. I'd go with the L6 unless the GPS and green data are things you'll actually engage with every round.
Get the Voice Caddie L6.
See Also