Allow me to disagree. Yes as such SFF is airborne infantry oriented to mountain ops. But their special.operation capabilities come from their primary mission objective to wage gurriella warfare inside Tibet. Which makes them SOF in a sense. It's a very niche tasking. They undertake small unit operations behind enemyNSG is a counter terrorist unit. Hence, it could be classified as SF. Their counterparts are GIGN (France), GSG-9 (Germany), etc. But SFF, the best way to describe them would be airborne light infantry. Same as US Army 75th Ranger Regiment. They are not SOF. Think of them as Para (Airborne) on steroids.
Lines. Paras are more oriented towards battalion sized ops
SOF is as much tasking as training and selection.
PS the 75th is a SOCOM formation with 1 company in JSOC and yes I agree. I would equat SFF as our Ranger Regt interms of orbat.
Paras - 82nd