The images here are screen shots from QTVR created from the same panorama file.
The screens hots have all been saved with High Quality JPEG

With the same compression the difference in size and sharpness is very large between Cinepack and JPEG. Look how the bricks disappears in Cinepack.

To get a usable quality with Cinepack you have to use normal (50%) compression and the file becomes about double the size as JPEG and Sorensen.