They're not that hot actually Phil. As they use the smaller 43AWG wire (rather than the PAF-style 42AWG) the DC resistance is higher but output and feel is very PAF-like. I've found them to be like a smoother PAF, slightly less raw and ragged.
The 'net seems to suggest 43AWG * 0.75 = 42AWG 'power', so the Emerald is a smoother 9k-ish PAF and that's what it feels like...