First impressions:
1. VERY crankable. Great 70s analog-style mastering, no harshness or brightness to my ears. Tight and punchy bass and drums.
2. I noticed some tambourine in War Pigs and Paranoid that I don't think are in the stereo mix at all, or are mixed very low.
3. Some other things that sounded different from the stereo mixes - the air raid siren in War Pigs and the guitar solo in Paranoid. Hard for me to tell if they are actually different or just tonally different.
4. Ozzy's vocals are mixed very low and distant, especially in War Pigs, like they are coming from a different room or something. It doesn't ruin it for me but I wish they boosted the vocals to make them more present and immediate. This is really my only nit-pick of the whole disc.
5. Love the panning in War Pigs. Drum breaks and guitars going from speaker to speaker.
6. Heavy use of the rear speakers throughout, especially the guitars. Hope your rear speakers are up to the task! This is definitely a mix that will favor those with 4 identical full-range speakers for the front and rears.
All-in-all, this is an awesome disc to have and this is will be my go-to version of this classic album from here on out.