I don't know about Maestro but i can tell you there is no difference in Crescendo and Crescendo II wires.Just different serial numbers.
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I should contact Overhang.
Maestro II has lower capacitance
due to a change in the microporous foam Teflon insulation andslight change in the individually coated conductor strands.
The latest version of Maestro is a dual symmetrical coax that can be used for balanced and unbalanced applications.
Feel free to email me for more details