Question: what is the difference between the 2 nest thermostats?
Answer: Like every other Nest thermostat, you can control the E via the outer dial. ... The main difference between the Nest 3 and third-generation model is the display resolution. While the E has a 320-by-320 resolution and uses frosted glass, the Nest Thermostat 3rd Gen is equipped with a 480-by-480 resolution.