Smlight SLZB-07P10 vs Sonoff Dongle-PZG23

It depends on your devices, but the Smlight SLZB-07P10 wins on protocol breadth, covering Zigbee plus Thread for Matter, while the Sonoff Dongle-PZG23 is a Z-Wave-only controller. If your gear is Z-Wave, the PZG23 is still the one to get despite the overall verdict.

The protocol. The Smlight SLZB-07P10 is a Zigbee coordinator that can also run Thread, with no Z-Wave. The Sonoff Dongle-PZG23 is a dedicated Z-Wave 800 controller with S2 security and Z-Wave Long Range, and it does no Zigbee or Thread.

Only the Smlight SLZB-07P10, which can be flashed to serve as a Thread border router for Matter alongside its Zigbee coordinator role. The Sonoff Dongle-PZG23 is Z-Wave only and does not support Thread or Matter.

The Sonoff Dongle-PZG23 is the more plug-and-play option, recognized quickly by Home Assistant with no flashing. The Smlight SLZB-07P10 ships with outdated firmware that usually must be flashed to the current version before it works as a coordinator.

Buy the Smlight SLZB-07P10 if you run Zigbee devices (and possibly Thread for Matter) on Home Assistant and want a compact, high-power TI CC2652P10 coordinator. Note it has no Z-Wave and typically needs a firmware flash first.

Buy the Sonoff Dongle-PZG23 if your home relies on Z-Wave, especially locks and sensors, and you want an affordable, plug-and-play Z-Wave 800 controller with S2 security and Long Range for Home Assistant or openHAB.