I have been testing comparing 8.02 to 9.04, same presets between two firmwares using my XL and AX8... will try to post a video with a few comparison examples by next weekend.
In general, my impressions so far are that presets originally created for 8.02 (and then made compatible with 9.02) are darker sounding on the new 9.04, meaning, without as much high-end detail - it's a notable absence compared to 8.02. They are also more compressed sounding. Not sure if there are simple solutions to getting them to sound like 9.02 or 8.02 (thoughts out there?)
Personally, I still think 8.02 is the bomb — fantastic high-end definition. It may be that under 9.04, that high-end can re-dialed back in, but for me not so easily so far... you probably will need to turn up treble for most amps by at least “+1” number setting to get back towards the 8.02 tone originally dialed in... but am glad a few of you have posted that you like the presets with 9.04...they will be a little darker and more rounded and compressed basically.
I'll probably wait to a firmware 10 before I do a complete overall of the TonePack, especially if the overall tones shift again in future releases from the original 8.02 tonal design -- it's 700 tones and 3 Fractal units, so it takes months to do it right (took me six months to put it all together, and I didn't have a full-time job competing for time then either!)