The sonic differences between Vandersteen Model 2 speakers from one generation to the next are significant. It takes Vandersteen many years to accrue enough improvements to warrant a new model. As for whether a pair of 2CE's is "worth" twice as much as a pair of older 2C's; that is in the eye of the beholder.
For me, there is enough sonic difference between the two that I would have no interest in the much older 2C at any price.
You'll probably find that a new pair of 1C's are better sounding, overall, than an old pair 2C's.
For me, there is enough sonic difference between the two that I would have no interest in the much older 2C at any price.
You'll probably find that a new pair of 1C's are better sounding, overall, than an old pair 2C's.