Crescendo I or Crescendo II ?

Has anybody compared Straight Wire Crescendo I XLR with Crescendo II XLR?
Can you describe the difference?
i have owned crescendo cables and there are very few I's around....this can be confirmed with straightwire.

i did audition a very early pair that might have been I's ( i am not sure....they didnt have the black caps) but they had had a slight mid bass boost that is typical of crescendo and sounded exactly the same as the ones i owned....

overall a very neutral cable that is true to the music and has a big sound...
Thank you Mike for information.