I'm also exploring the Gold Tone MicroBass, so I'll be able to say more soon, too.
Here are my guesses at this point:
1. The MicroBass strings are probably made in a similar way to the Thunderguts, but they are also probably tweaked for the different scale, making them not identical to Thunderguts.
2. As someone pointed out, there are Pahoehoes for scales longer than the 21 inch UBass, so, in all likelihood, Pahoehoes will work on the MicroBass.
And now my editorial two cents:
Don't give up on the MicroBass/Thundergut strings so quickly. I truly believe they are far superior to the Pahoehoes. Honestly, if the Pahoehoes were the only game in town, I wouldn't have remained in the UBass world. They are the biggest pain to put on and get to stability. They are only marginally better than Ashbory strings, in my book. [which were a disaster]
The Aquilas are stable in 1/10th the time, and I think they they have tone that can be used for many more situations than the Pahoehoes. If you are one of the few who experiences the tackiness, get a tiny billiards talc bag, and this won't be a big deal.
Life is too short to hassle with Pahoehoes.
