In addition to what everyone else has said,
the crucual difference between the two Shredder
versions (with and without UCI), is that the UCI
version is using a better openings book, because
the ChessBase interface doesn't correctly support
the Shredder book, wheras the Shredder Classic (UCI)
Now this sounds like an important thing. Is UCI version of, say 7.04
Schredder on sale somewhere?
Shredder 7 UCI (and interface and book) are included on the Shredder 7 CD.
7.04 is a free upgrade.