sorry for the resurrection, but I just lived this adventure
I bought a Mahimahi S3 tenor, a nice solid mahogany instrument, 14 frets and geared tuners, very light and loud, just like the soprano of the same series.
it arrived with it's Aquila Super Nylgut for tenor, heavy gauge and stiff, and even after a good setup (bridge and nut lowered) they felt to heavy and stiff, in particular on the C string.
also, the sound wasn't so good, too much attack, too short sustain...
so what happened? I was looking at a video comparison between the Kiwaya's mahogany ukes in the three different sizes, and I really liked the sound of the KTT2 (if I recall correctly, it's a video by Southern Ukulele Store), so I decided to try the GHS black nylons that I have on the KTS4 and KTC1, a set that I like a lot both in feel and sound, but looking at the GHS's catalogue I noticed that the tenor strings have the wound C string, but the Kiwaya's tenors don't have the wound C.
I asked them, and they told me that they use the same set on all their ukes, and it's the soprano/concert set, GHS H10, which has a gauge slightly thinner than Aquila for Soprano.
so I ordered a set and... WOW!
the tension is slightly different, not too much lower, but they are a bit more flexible, and I found them more comfortable for the fretting hand.
also, the sound kind of opened up: even if they are mellow strings, not harsh like the Aquila, the overall sound is clear, very projecting and still with high volume, as expected from a solid mahogany uke with thin woods, but with more sustain and "singing" notes.
so I wanted to share my little experience
I've always played only sopranos, so I didn't know much about tenors, and my concert is a month old, but with a set of strings that is the same as the soprano.
however, I think that I made the right choice, and will stick to lighter strings on the tenor.