[PyMOL] alignment algorithms

Dear PyMOL users,

I have browsed the wiki and the first 300 mailing list messages in the
archive (the sourceforge archive does not seem to have a search set up
for the archive... arg!), but did not find any details about the
algorithms behind 'fit' and 'super.'  I understand how align works,
and it sounds like fit is align but without the processing steps
(assumes 1:1 correspondence).  Super, on the other hand, sounds more
like CE since it is sequence independent, but I cannot find any
corroboration on this.

I want to run CE or a like algorithm (sequence independent - only
concerned with spacial arrangement of alpha carbons) on a large
dataset and want to know my options in terms of speed and accuracy.

Sincerely,
Mike Z