Mail call!
I decided to start my inquiry by contacting the US representative for Optima, located in Malibu, CA. I received a very quick reply from a gentleman who is himself a bass player. I don’t think I’m breaching any confidentiality by posting his response as follows:
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“From the 3 available types, the Unique 24K strings offer the best approach to modern sounding strings, somehow related to the Marcus Miller sound on Fender type electric basses. These strings [have] a very wide dynamic range with vast warm and clear overtones and very round and punchy sound.
“The Optima 24K line of strings are my favorite so far since they perform very well on fretless and fretted basses with a bit darker tone than the Unique 24K but very responsive to all sorts of dynamic approach.
“The MaxiFlex are different in the sense that they have a thinner core (hex-core) than the other two types of 24K strings whilst still keeping the same gauges. This quality makes them darker sounding but very flexible to perform with.”
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I was told that my questions would be forwarded on to the head office in Germany, so I will report again if and when I hear from the mothership.