What are the differences between cubic stitching and spherical stitching?

Below are their differences:
A 1:6 image is created after cubic stitching, while Spherical stitching creates a 1:2 equirectangular image.
The output formats are different.
Spherical panorama can be output as PTViewer (.jpg, Java applet), while cubic panorama can be output as QTVR (.mov).
With cubic stitching, the modification of the floor is much easier.