Smlight SLZB-06 vs Sonoff ZBDongle-P

The Smlight SLZB-06 is more capable, since it adds Ethernet, PoE and Wi-Fi placement, a +5dBi antenna, a Thread border router and a Bluetooth proxy on the same CC2652P radio. The Sonoff ZBDongle-P is cheaper, higher-rated and carries a 2-year warranty, making it the trusted value pick for a USB setup.

Connectivity, since both share the TI CC2652P chip. The SLZB-06 is a network coordinator (Ethernet, PoE, Wi-Fi and USB) that also does Thread and Bluetooth proxy, while the ZBDongle-P is a USB-only stick with no Thread or Bluetooth proxy. Neither supports Z-Wave.

Yes, both are built on the Texas Instruments CC2652P, one of the best-supported Zigbee radios for Home Assistant. The difference is what surrounds it: the SLZB-06 adds network connectivity, a stronger antenna, Thread and a Bluetooth proxy, while the ZBDongle-P keeps it a simple, cheaper USB stick.

Buy the Smlight SLZB-06 if you want to mount your Zigbee coordinator centrally over Ethernet or PoE for better range, with Thread and Bluetooth proxy support. It is the choice when placement freedom and extra features outweigh a lower price.

Buy the Sonoff ZBDongle-P if you want the community's proven, high-power USB Zigbee coordinator at a lower price and with a 2-year warranty. It works cleanly with ZHA or Zigbee2MQTT across almost any host and covers multi-floor homes; a short USB extension helps with its bulky case.