What's the difference between Sync to Save and eco+?

If you have an ecobee thermostat, Sync to Save will work with the eco+ Community Energy Savings function on your thermostat to keep your home comfortable while shifting your energy use during Peak Energy Events. When you first sign up for Sync to Save, you'll use the ecobee app to sign up through eco+. After you create your thermostat schedule, Sync to Save will work together with eco+ to learn your preferences and keep you comfortable during Peak Energy Events.