Can anyone please explain the differences in the Rigoutat RIEC and the Rigoutat Evolution/Expression? I know that the professional models have the c-d trill on the top joint that the RIEC doesn`t but are there that many more differences? Is there a huge difference in the actual sound? (By the way, I have a Rigoutat RIEC)

There`s some info on the following web page. Scroll down to Rigoutat.

http://www.ddorian.com/idgets/brands.htm

Bill