What are the key differences between Comfortmaker and Rheem air conditioners?

Comfortmaker and Rheem are both mid-tier residential air conditioner brands but come from different parent companies with different engineering philosophies. Comfortmaker is manufactured by International Comfort Products, owned by Carrier Global, built in Lewisburg, Tennessee, using Carrier engineering and components like Copeland compressors and Micro-Channel coils shared with Tempstar and Heil. Rheem is manufactured by Rheem Manufacturing, owned by Paloma Industries of Japan, built in factories in Georgia and Mexico, and shares platforms with Ruud and WeatherKing. Key differences include efficiency range, where Comfortmaker offers up to 19 SEER2 while Rheem offers up to 20.5 SEER2 on its premium Endeavor line. Rheem has its own proprietary EcoNet smart thermostat and communicating system, while Comfortmaker uses standard thermostats and Carrier-based controls but not Infinity communicating. Build quality is similar, both using durable cabinets, but Rheem emphasizes its PlusOne service features like expanded service space and Rheem's 360+1 design for easier installation. Reliability surveys show both are above average, with Comfortmaker slightly better for parts commonality and lower repair costs due to universal parts, while Rheem has strong reliability in southern markets where it is very popular. Price wise, both are mid-tier, with Rheem often slightly more expensive than Comfortmaker for comparable efficiency. Warranty is similar with 10-year parts when registered.