When I go to the music store, I notice nylon strings are grouped by tension instead of gauge like steel strings. The nylon strings are labeled from "extra low" tension to "extra high" tension. According to the guitar guru there, you can put any of these on most nylon string guitars with out fear of damage, the main difference here is playability, sound, and personal taste.
The higher tension strings will make a guitar sound louder but it will be harder to fret for example. Heavy handed strummers would probably like the high tension strings.
Low tension strings would sound better on a lighter braced guitar perhaps and they would offer easier playability.
Bob, Gman ( o )==#
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