Honeywell RTH6580WF vs Honeywell RTH9585WF1004 Wi-Fi Smart Thermostat
Looking for an honest Honeywell RTH6580WF vs Honeywell RTH9585WF1004 Wi-Fi Smart Thermostat comparison in 2026? We scored both smart thermostats on the same six-dimension framework — performance, battery, display, camera, design and value — using identical methodology, so the numbers below are directly comparable. Both products score nearly identically (47/100 vs 49/100) — this is a genuine toss-up that hinges on which specs matter most for your use case. The widest gap is in design and build, where the Honeywell RTH9585WF1004 Wi-Fi Smart Thermostat pulls noticeably ahead. On price the Honeywell RTH6580WF undercuts the Honeywell RTH9585WF1004 Wi-Fi Smart Thermostat by 60% ($39.99 vs $63.99), which materially changes the value calculus for budget-conscious buyers.
