Hi, the ST stock device exposes about 10% of the ecobee APIs.
My Ecobee Device (custom DTH) exposes more than 80% of the ecobee APIs, and amongst others, you can then determine if your ecobee is in vacation mode or not (programType attribute).
Please refer to the ST community wiki for more details about the attributes, capabilities, and commands available.
No other ecobee implemention exposes as many commands & attributes for WebCore Automations.
https://thingsthataresmart.wiki/index.php?title=My_Ecobee_Device#Information
See all complimentary smartapps & use cases available under my ST community forum thread (and testimonials):
Regards.