The Coway Airmega AP-1512HH Mighty leads with superior 246 CFM CADR and 361 sq ft coverage versus the Levoit Core 300S's 141 CFM and 219 sq ft per manufacturer specs. Levoit counters with smart app integration and lower 28W power draw. Coway wins for performance-focused users while Levoit suits small-room smart-home setups.