The ES-10s are black: http://eu.audio-technica.com/en/products/product.asp?catID=5&subID=38&prodID=3981
I meant, one way to differentiate fakes from authentic (other than price) is the plastic used on these Audio Technica. They are black but if you look closely in the light, you'll notice tiny gold sparkle.
Fakes are missing the sparkle. No sparkle = no magic :) ! I'm not kidding... Another way to spot knock offs is by the driver's coil color (simply by removing one pad) Fakes are cooper/yellow instead of Blue for the real deal.
ESW9 and ESW10 are notorious for being fakes half the time! Some have also reported fakes ES10 : (