Coated Emperor® heads are warmer and more durable than Clear Emperor®s. They’re made with two free-floating plies of 7-mil Mylar® film, which gives consistent open warm tones which accounts for their popularity among many of today’s Studio, Pop, R& B and Rock drummers.
Remo provides the following Head Performance Profile for the Coated WeatherKing drumheads:

Tone: warm
Pitch: mid
Sustain: short
Response: high
Durability: mid