The K240 MKII model is the successor to the K240. They both have the same specs, but the MKII features an updated design as well as new ear pads and cables.
The earcups on the MKII come in either velvet or leatherette. It comes with both the 3-meter straight cable as well as a 5-meter coiled cable.
Beyond that, the only difference is the MKII model has blue accents, whereas the original K240 has gold.