GGTS has some small improvements as regards to GGT
1) Shorter button. GGT 11mm, GGTS 7mm
2) bigger front cap so you can screw it and unscrew it easier
3) different back cap so no stuck caps any more
4) a very small spring and internal too on the litlle brass axis inside the front cap, so almost invisible. GGTS works without this spring too, its only for AFS. I mean that button stays always in the up position even if the hole of the atty is up or down
5) Better mat finish
6) almost sealed from liquid
You already know all the other options of GGTS, I just say the diferences between the same things on GGT and GGTS

1) Shorter button. GGT 11mm, GGTS 7mm
2) bigger front cap so you can screw it and unscrew it easier
3) different back cap so no stuck caps any more
4) a very small spring and internal too on the litlle brass axis inside the front cap, so almost invisible. GGTS works without this spring too, its only for AFS. I mean that button stays always in the up position even if the hole of the atty is up or down
5) Better mat finish
6) almost sealed from liquid
You already know all the other options of GGTS, I just say the diferences between the same things on GGT and GGTS