The LaScala II has 1" MDF which is supposed to cut down on some problems with the bass. The II is a much more attractive speaker, higher WAF. I own a pair of LaScala's and have heard the II's demo while at the factory in Hope.
Major changes between the II and I:
1" MDF in the bass bin.
Separate top hat for the tweeter and squawker.
Tweaked the crossovers.
Weighs more than the K-horn.
More sensitive than the k-horn by 0.5 dB.