Hi Thomas,
Thanks for reaching out to us and welcome to the community! We're excited that you're considering a Nest thermostat in your home. I'm more than happy to look into this for you.
While you can also
compare features here, the Nest Learning thermostat is the model that learns from your
temperature preferences over time, creates custom schedules, and adapts to them whenever you make changes. It is also the model that doesn't necessarily require a C-wire if it's not already existing in your HVAC system (which can be a hassle to install). They're also better suited for complex, modern HVAC systems (around 95% compared to Nest thermostat's 85%). However, both have energy-saving features, can be controlled through the Nest/Google Home app, and can be work with Alexa or Google Assistant.
Let me know if you have any other questions for us. We're here to help!
-From Ai, Community Specialist.