The original 1 is quite veiled. The IC is much more transparent. It's as if a blanket has been removed from the speaker.
The new I CI is a major improvment as wendel mentioned
The bass loading, x overs, inductors, all new drivers,
computor matching of drivers in chamber improved Bases, places the new Vandy 1CI well above the mark of 24 plus years ago. You will really love the new ones.