dunno... if you ask me then i'll say that there is no any actual adjusting and filtering that will make Brainkiller's version from Pioneer's one. there is [in Brainkiller's version] some spectrum of high frequencies that can't be reconstructed from Pioneer's. if you try to equalize Pioneer's version that won't help to get what is absent at all. equalizing is a somekind of "smart amplifier", that's not a magic stick at all.
the only way where to get high frequencies back is resynthesis. that process means [here] "making up" high frequencies with using info about middle and low frequencies, that technology used in mp3pro coding. but there is no any other soft atm that use these algorithms. so, i can continue talk about it, but it's a deep technical stuff.. but it's a off topic in here.
That's right, I'd say it's impossible to make the pioneer-version go sound like the brainkiller-version.
The best proof would be the stereo-format the brainkiller-version is in, whereas the pioneer-version is mono.
[Sometimes crowd-speech is on only one channel, so it wasn't edited with a stereo-expander]
My guess is, that the brainkiller-version was the first, and then the pioneer-one was born from it. Don't ask me why.
But as Zed said, no live-recording sounds THIS ugly...
It's also good hearable that the recording was edited, since you have a static fuzz all over the track which could only come from a mircophone covered in some playce of the clothes or a mega-ripple. Both seems untrue here, since the guy/girl must have stood totally still if the mike was in the jacket or something, because you can't hear any crunchy-movement-sound. I suppose it was at least a similar recording as brainkillers.