Across 13 features we can compare from the published specs, the Polk Audio MagniFi Mini AX comes out ahead on 2 and the Harman Kardon Enchant 900 on 5. The biggest difference for movies is height: the Harman Kardon Enchant 900 has 2 ceiling-firing channels and the Polk Audio MagniFi Mini AX has none. Only the Polk Audio MagniFi Mini AX comes with a subwoofer, which matters when comparing the prices.