The two elements do exactly the same thing (identical link) for some integrations.
To avoid overloading the visual/page with unnecessary links, I propose keeping the integration name clickable and removing the « Open in integration » button for devices that have the same link.
In mobile version, there is no such button; you see the integration name, and by clicking on the device, you switch to the integration or the device.
The « Open in integration » link used to take you directly to the device in the integration for mqtt, zigbee2mqtt, xiaomi, tasmota, ewelink, tuya, melcloud, broadlink, bluetooth. You can now click on the device name.