mle86Yes. This question gets asked a lot. Also I don't think the Pros come in 600 ohms. Premium vs pro the materials used in construction are different. The drivers are the same. However, clamping force is different and to some this changes the sound signature. People say that the pros are more clampy than the premiums, and the premiums feel much more comfortable. I'm not sure about this part, but I think the pros have a heavy coiled cable, while the premiums have a straight cable. Either way it doesn't detach. I would have jumped on this drop but I got the 880/600 manufaktuar. If this was the 990/600 all black I might have also.