What is a difference from DDJ-ERGO-V?

Those are differences,

body color, button design and illumination color. DDJ-ERGO-V was desinged to give casual and soft impression. DDJ-ERGO-K was desinged to give chic and modern feeling by using premium black color like professional equipment.

DDJ-ERGO-K comes with "TRAKTOR LE 2" although DDJ-ERGO-V comes with Virtual DJ Limited Edition.