A:Answer Hey there and thanks for considering GE Appliances for your home. Model PDT785SYNFS has a dba level of 39, making it slightly quieter than the PDT715SYNFS model, which has a dba level of 45. Model PDT785SYNFS has variable motor speed, Leak Defense with Active Flood Protect, a hidden heater, twin turbo boost dry, fold down tines on upper and lower racks, built-in WiFi, and heater wattage of 1200/400. Model PDT715SYNFS has a single motor speed, Active Flood Protect, Dry Boost, fold down tines on the lower rack, optional WiFi (part sold separately), and a heater wattage of 800/500. If you have any additional questions, please let us know. We’re always happy to help. -Gina@GEA