EDW and I have both been having a bit of a Nytech/Nylgut renaissance lately and have been discussing and trying to figure out the difference between the current Nylguts and Nyltechs. I had some Super Nylguts on my Weymann soprano and then tried some Nyltechs. I was really suprised by how different they are. The Nyltechs have more tension, snapiness, volume, clarity and to my ear better string to string balance. While I wouldn't say they are at all similar to flourocrabon I feel like they are less dissimilar from flourocarbon compared to the Supers. On the flip side the Supers are fuller, smoother, more blended sounding, and more sustaining. While playing I found myself prefering the feel and sound of the Nyltechs, but listening back to recordings I can honestly say I didn't have a strong preference. I guess for instrumental stuff I would tend to prefer the Nyltechs, especially for chord melody where you really want to hear the melody notes within the chords. For strumming and singing I may lean towards the Super Nylguts, but could go either way. Anyway, at the moment I have the Nyltechs on the Weymann and the Supers on my Pohaku. Both are working well for me for now, though I may go back to flourocarbon at some point, at least on one of my ukes.
As I was researching this stuff I ran across some old threads where people said the Nyltechs are most similar to the original Nylgut formula. I also was reading the descriptions through the descriptions of Aquila's classical guitar sets and noted that every reference to Nylgut in those set simply say "
Nylgut" not "
Super Nylgut" or "
New Nylgut", all of which appear to be different trademarks. I've never tried Aquila's classsical strings but this leads me to wonder if those are the original formula and perhaps more simialr to the Nyltechs; I may order a set of trebles for my nylon string guitar. Regardless, the Nyltechs are clearly a differnet formula from the Super Nylguts and while I haven't compared them to "New Nyguts", they seem pretty different from what I remember those being like. The actual strings are much stiffer and you can really tell this when you are tying the knots for the bridge. The Nyltechs also seem to be a bit of a softer material or perhaps have a coating on them. I only think this because when I was stringing them through my tuner holes I noticed that when the string rubbed against the edge of the holes waxy little shavings would occassionhally come off. To be clear this is on good Peghead tuners that do not have sharp edges and there was no damage to the strings, it was almost like thin layer of wax or something was rubbing off or something. Again, I new the Nyltechs were not identical, but I was jut quite suprised by how different they are.
I always make a quick recording for later reference when I change strings.
Here is the Weymann with "Nytech":
https://photos.app.goo.gl/4jwsYjjw62tar1Ai8
...and here it is with "Super Nylgut":
https://photos.app.goo.gl/myos6Lv7dgnKaZPy5
These aren't great recordings so I wouldn't use them to judge which you like better, but hopefully they illustrate that they sound suprisingly different.
(P.S. Don't be like me. Don't waste your time with this stuff. I'd be a better player if I didn't, but I just can't help myself.)