The recording of the webinar is here: https://www.youtube.com/watch?v=SyDSB5VM2Bw&list=PLUSJC5mjKZ9SIASpVJNWKWCSS9hVzjiFA&index=2
This webinar discussed the differences between the two OGC standards for IoT data exchange, i.e., OGC Sensor Observation Service and the OGC SensorThings API. It compares the two specifications in terms of interoperability, feature list, developer experience, efficiency, scalability/discoverability, and security. In summary, SOS and SensorThings are both interoperable. SensorThings can interoperate with SOS but not the other way around. SensorThings offers more features, better developer experience, better efficiency, and better scalability. In terms of security, SensorThings API can leverage the XML/SOAP security mechanisms by offering an SOS interface.