edition with rose cross backs

BrightEye

I bought this pocket size edition in Germany as a deck-and-book set. It has purple back with a red and yellow rose cross. I loved the backs, so I had to have it. Is it just a gimmick edition or does it have a history? Some of the colours in the cards are little different to the edition that comes in the yellow box. For example, the sky in the 3 of wands is a very dark yellow, almost ochre.