BLU-SPEC CD ?

In times where more and more artists have a hard time finding a record company and can hardly sell any cd's, I find it fascinating that other parts of the world have another approach.

The last couple of years, Sony Music Japan has been releasing a number of CD's that have been produced using Blu-Spec technology, resulting in so-called Blu-Spec CD's.

https://en.wikipedia.org/wiki/Blu-spec_CD

As I was too intrigued, I recently purchased my first Blu-Spec CD: Steve Vai's "The Story Of Light".
Sounds pretty good. But so did the original / regular release.
I guess I would have to compare the two next to each other...
And, no, it did not come with an mp3-download code.