How close do the M&O's sound compared to the RBH's connected via 3.5mm?
They sound virtually identical to me. In fact, one time, I had one on my head and I thought it was the other. It was only when I felt the side of the cable that I realized I was wrong. Supposedly, they are tuned a little differently, and perhaps I just wasn't listening critically enough, but it was difficult for me to tell the difference.