Stuck choosing between Rheem and AO Smith for your next water heater? This article breaks down how these two big brands stack up in real-life situations—from reliability and repair costs, to warranties and energy efficiency. Learn which brand takes the lead on lasting hot showers and which one goes easy on your wallet. Packed with practical tips and honest insights, you'll finally get clear answers based on real experiences—not just sales pitches. Discover everything you wish you knew before buying or repairing your water heater.