What IOT solution should I use?

What’s the most up-to-date IOT solution for samsung wearables? There seems to be conflicting information in the documentation. This page tells me to use Iotivity:
https://docs.tizen.org/application/web/guides/connectivity/iotcon

But this page tells me to use SmartThings:
https://developer.tizen.org/ko/development/iot-extension-sdk/getting-started/tizen-iot?langswitch=ko

But this page tells me to use Zigbee:
https://developer.tizen.org/ko/development/iot-extension-sdk/api-guides/zigbee

Which solution one that works for Tizen 4.0 and 5.0 with long term support from Samsung?