The 2ci used a 3/4" tweeter that is not near as transparent as the 1" in the 2Ce. Beware, however, that there are some 2Ce's with the same 3/4" tweeter. Check the serial number with Vandersteen. He didn't have the 1" on hand for a while and substituted the 3/4". How do I know? I had a pair of the 2Ce with the 3/4" tweeter back in the early 90's. other than that, they are pretty much the same.