The bad kind of differences.
The good: The art is greatand the music is good too.
The bad: The differences are mostly variations in colour. Seldom objects and almost never story relivant objects. This is an ok game with great art.
How to make this a ten: The best that I have seen are difference games where the differences were things like the knights sword was cracked instead of new and in the next sceen we see the knight breaking his sword.
This game has the weakest form of difference: it is often small changes in colour and it deletes the change that you click on. It represents simple programming and a weakness in game design. The art is amazing an is worth a play through but not a repeat.