What do you mean perfect?
The Senheiser frequency responce is: 18Hz to 22000Hz (headphone) and 80-15000 the microphone
The AudioFX : they say 20-20,000Hz (I really doubt it, doesn't barely sounds like a 20-20000) and 30-16000 the mic (I doubt this too, a voice recorded with two mics shows much more quality in Senheiser, much more!)
I have both and when I compare it with same audio track the different is the same between a C172 and a F-15.... Sound of AudioFX (compared with the other one) has no high frequency.
Also, when I lower the volume it goes totally unbalanced (left right).
I don't know if Edimensional did a different version , my headset look the same has this buut I bought it some time ago..
Also consider Sennheiser is a name in this market.