Some of the Beats models have a pretty decent FR curve. It's helpful that the FR on the PM-1 is flat but it tells us nothing useful at the same time. Speed, decay, sound stage, prat, distortion, frequency comparison's with other phones is what everyone is looking for. I'm sure I forgot another handful of attributes as well. Treble amount being comparable doesnt mean the treble sounds even close between models. No poetry needed.
Ok, I'll try and be patient now :-)