The fluxuration slowness and quickness is probably due to wow and flutter from not so great tape decks or not so great tape reels so I'd imagine the edits done here are correct anyway to the sources of the masters. Well as correct as they can be.
As it's tribal I'd probably go with the fastest speed one to match the BPM's of the 3 tracks or if it's all the same BPM anyway keep it how it is. It's about finding the mix you prefer really when going for making the wow and flutter free lossless version.
Then you have the cleaner tape source anyway to base it on as well that JD Thump version although only a long sample of the track is on there it helps for a bit of accuracy on the first 1 minute and a half probably because the speed and quality is more accurate compared to the lossless still has a lot of wow and flutter so probably won't help afterall.
Good jobs guys
Edit: Seems whatever speed Godz parts were are more accurate because in a Virtual DJ compared to the more accurate speed JD Thump version of the cassette when it matched my BPM's up GodzFire's one sounded perfect to the tape at it's given values of +5.9 difference didn't mess up the pitch of the sound.
It's a shame as Bubba's ending was more accurate and the bitrate came out a bit higher but because it was layed out in the correct speeds in the editing booth GodzFire's sounded correct on the +5.9 thing making his attempt the actual theme.
Now if someone can remake it with GodzFire's Speed matching and bubba's accuracy having a decent ending and stuff with a +5.9 change in speed it would sound spot on.
Here's GodzFire with the speed set though until we see a second bubba edit with the correct ending with the Godz layout and the same +5.9 speed.
Here's a fun bonus as well a compare of Evil Empire and what it seems to be based on albeit with some notes took out in the remake, a pitch change, a speed lower, and Johnston beats added to it replacing the Tikaham beats which seemed to have been completely beat removed in the remake might even be redone by Johnston on the same instrument at a slower tempo wouldn't put it past him.
Seems like everytime wrestling remakes mainstream there is weird stuff going on like they used real stock footage and chopped notes out as well as remove all back beats, speed it up, pitch shift and all sorts of weird stuff to get away with it or if you are lucky they remake it completely on the same instrument.
I remember when they did it to Zorro as well for FCW and the intro of it was pitch shifted to sound like rapid tap dancing whilst when it got into the track it sounded reletively normal speed as well.