What They Have in Common
Both are no-subscription launch monitors under $700. Both connect via Bluetooth and include simulation software — 10 courses for the Square Golf, 5 E6 Connect courses for the SC4 PRO. Both measure the core shot data you'd expect: ball speed, launch angle, carry, spin rate. Neither requires club face stickers.
Where They Differ
Technology — and What That Means for Accuracy
This is the most important difference. The Square Golf Original is photometric — it uses a high-speed camera with machine vision positioned beside the ball. Camera-based monitors capture the ball at impact, which gives them a real advantage for spin data indoors. The SC4 PRO runs Doppler radar, which tracks the ball in flight. Radar is rated at ±2% ball speed and ±3 yards carry in target mode — solid numbers for a $600 unit. But radar-based spin indoors is a different story: without actual ball flight to track, spin readings get iffy. The Square Golf's photometric approach sidesteps that problem by imaging the ball directly at impact rather than inferring spin from flight.
The catch: the Square Golf requires dotted balls. They're not expensive, but they're not your regular Pro V1s either, and you'll need to keep a supply on hand.
Where You Can Actually Use Them
The SC4 PRO works indoors and outdoors. The Square Golf Original is indoor-only. That's not a knock — most sim setups are indoors — but if you ever want to take your launch monitor to the driving range on a Saturday, the Square Golf stays home.
Setup and Space
Camera-based monitors are typically more placement-sensitive than radar units. The Square Golf sits beside the ball at a specific position and angle; radar units like the SC4 PRO are more forgiving about placement. If your setup changes often or you're using the unit in different spaces, that matters.
Display and Range Usability
The SC4 PRO has a built-in LCD screen and voice output — it literally calls out your distance after each shot. If you're at a range without Wi-Fi or without your phone, you've still got your data right in front of you. The Square Golf has no built-in display; you're running everything through a phone, tablet, or PC. Fine for a sim room where you've got a screen mounted. Less convenient at the range — not that you'd be taking it there anyway.
Club Data and Metrics Depth
The Square Golf Original includes full club data: swing path, face angle, dynamic loft, and angle of attack, all included. The SC4 PRO covers carry, total distance, ball speed, swing speed, smash factor, launch angle, apex, spin rate, and spin axis — no swing path or face angle data. If club data matters to you (and it should if you're working on ball-striking), the Square Golf's camera-based approach has a real edge here.
Simulation and Software
Both include courses at no extra cost — Square Golf gives you 10, plus GSPro compatibility. GSPro is a serious sim platform with hundreds of courses available, though courses beyond what's included cost extra. The SC4 PRO includes 5 E6 Connect courses. E6 is polished software, but 5 courses is a limited library. If you want more, you'd need to pay for E6 upgrades. Neither unit locks core features behind a paywall, which is refreshing.
Who Should Buy Which
Square Golf Original
- You're setting up a dedicated indoor sim room with a hitting mat, net or screen, and a mounted display.
- You want to work on swing mechanics — face angle, angle of attack, swing path — not just track distances.
- You're already sold on GSPro or want access to its course library.
- You're comfortable buying dotted balls and keeping them stocked. At roughly $40–50 per dozen for most dotted ball options, budget for a couple sleeves a month if you're practicing regularly.
- Indoors-only is a feature, not a bug — your practice setup is fixed and you don't need a portable unit.
Swing Caddie SC4 PRO
- You hit the range three or four days a week and want real carry numbers without fussing with a phone every session — the voice readout handles that for you.
- You practice in multiple locations: backyard, the range, a friend's sim setup, your own net indoors.
- You don't want to deal with special balls. Ever.
- The 10-hour battery and standalone display mean you can run a full session without any tech setup.
- You're newer to launch monitors and want something approachable before committing to a more involved setup.
The Bottom Line
If you're building an indoor sim setup and care about club data, the Square Golf Original earns the extra $100. The photometric approach gives you more reliable indoor spin data, the club metrics are more complete, and GSPro compatibility opens up a real course library. The dotted ball requirement is a minor ongoing cost — from what I've seen, most dedicated sim users adapt to it quickly because the data quality justifies it.
If you want something you can use anywhere without thinking about it, the SC4 PRO is the better tool. It's simpler, more portable, works with any ball, and that built-in display is genuinely useful at the range when you don't want to manage a phone.
Get the Square Golf Original.
See Also