I just love the Gladius, and when they offered the upgrade, I had to get it.
The upgrade is just great -- better beam, waaayy brighter
without degrading the usefulness, due to the adjustable brightness. I miss the low-low of the old Gladius, though. The lowest setting of the SSC Gladius is already bright enough to be annoying with dark-adapted eyes.
Typhoon/Gladius: Both lights are made by Insight. Blackhawk/Night-Ops developed the light, and licensed Insight to mass-produce it. The licensing agreement forced Insight to initially produce only for BH/Night-Ops. After some time (1 year, 2 years? Forgot when the Gladius was introduced), Insight was allowed to sell it under their own brand name. Both lights are identical and made by the same company in the same production facility.
The current black lights are all HAIII. The other colors are still Ceracote, I believe.
The tailcap problems are long resolved. They were due to QC problems with the additional signal cable from the tailcap to the head; the cables were sometimes to long to make reliable contact with the tailcap (this signal cable necessitates the alignment pin).