What is the difference between a cantor and a cantorial soloist? What
are the duties of a cantorial soloist?

Read the first two posts on this website. (the posts by: Amy O Miller
and Stephen Weisman)  They give a clear explanation of when someone
would be called a "Cantor" or "Cantorial Soloist".

http://www.mljewish.org/cgi-bin/retrieve.cgi?VOLUME=5&NUMBER=139&FORMAT=html

To summarize:

Cantor is an official title that is awarded through the various
channels of the Jewish "church", while a cantorial soloist is
respectful (but unofficial) title someone filling the role of a
cantor.

It is explained very clearly between those two posts.

Thanks!


Thanks!