There are two main aspects to picture quality. One of them is the colour of the image. The dynamic range of the image decides how vibrant the colours are. Because Blu-Ray disks can hold more data, it is not surprising that the colours look better on it. Another factor is the resolution of the image. Generally, animation on Blu-Ray disks offers far better resolution than their DVD counterparts. Both of these work together to give you a far superior visual experience than a typical animation DVD. Besides the picture quality, you will also notice some notable improvement in the audio quality as well.