First Alert SMCO410 Smoke Detector & CO Alarm vs X-Sense WiFi Smoke & CO Detector

The X-Sense WiFi Smoke & CO Detector wins overall here as the better-reviewed, more affordable combo alarm, and it adds an LCD screen the First Alert lacks. The First Alert SMCO410 Smoke Detector & CO Alarm counters with a longer 10-year warranty and Z-Wave and Home Assistant integration.

Both detect smoke and carbon monoxide, so the biggest difference is how they connect and what they show. The X-Sense WiFi Smoke & CO Detector uses WiFi with an LCD display for live status, while the First Alert SMCO410 Smoke Detector & CO Alarm uses Z-Wave with Home Assistant support and a longer warranty but no screen.

The X-Sense WiFi Smoke & CO Detector has an LCD screen, while the First Alert SMCO410 Smoke Detector & CO Alarm has no display. Both include a built-in siren and detect smoke and carbon monoxide.

The First Alert SMCO410 Smoke Detector & CO Alarm integrates with Z-Wave and Home Assistant, so it slots into a hub-based smart home. The X-Sense WiFi Smoke & CO Detector connects over WiFi to its own app with no hub, but it has no third-party platform integrations.

Buy the X-Sense WiFi Smoke & CO Detector if you want a well-reviewed, affordable combined smoke and CO alarm with an at-a-glance LCD screen and simple WiFi app alerts, and you do not need hub-based smart home integration.

Buy the First Alert SMCO410 Smoke Detector & CO Alarm if you want combined smoke and CO detection with a long 10-year warranty, Z-Wave connectivity, Home Assistant support, and Steam Check to cut cooking nuisance alarms.