We review the features of the Nest vs Nest E thermostat to help you decide which smart thermostat is best for you. The Nest Thermostat Generation 3 has more features and a higher end design than the Nest E thermostat. The Nest E still gets the job done but does not have the same high end look as the Nest Gen 3 thermostat in the looks category in Nest vs Nest E, the Nest is the clear winner. The Nest E is a lower cost vs the Nest Generation 3 thermostat and will still save you energy but do the cost savings justify the plastic design vs the smooth polished high end metal design of the Nest Generation 3 Thermostat.