And honestly, I don't know what to think. It isn't really better or worse than the mp3 version. Just... Different. I'm not generally one given to critical listening, so this review will be short, but hopefully reasonably clear.
On the mp3 version, the horns are nice and forward; the sacd version, not so much. Some of the horn detail is lost on the sacd. This is really noticeable on 'Soul with a Capital S,' which is, to me, basically the quintessential tower of power song. That leads to a poor first impression.
On the plus side, the vocals show up much better on the sacd than they do on the mp3 version. This isn't to say that the vocals are done badly on the mp3/cd mix, just that they're done better on the sacd.
Another neat thing about the sacd (at least if you're like me), is the bass. The sacd has a lot of thump to it, which you don't get as much of with the mp3.
An odd observation: the mp3 version is, simply, louder. Not hugely so, but a noticeable difference in volume between the two, when going back and forth with settings remaining the same.
All in all, it's not a bad purchase, as I only had the album on mp3 before, and I now have a physical copy of it. But, if you already have the Soul Vaccination live cd, I would probably pass on it.
Another note, reviews I've read of this sacd were all over the place, so I was expecting the worst. I'm now pleasantly surprised that it's decent, but disappointed that it wasn't done justice in the sacd remastering process.
If anything needs clarified here, let me know. I'll do my best to answer any questions.