pablo, your reading comprehension leaves a lot to be desired. not only did you misunderstand the OP's intent, but you havent even answered his question (which should be easy since you know everything there is to know about everything, right?).
I dont really know what makes them worth the crazy price, but in general cine lenses are:
Marked in T-stops (dont know why)
De-clicked aperture (adjust aperture while filming with no sound or vibration)
parfocal (change zoom without losing focus)
No focus breathing (change focus with subjects keeping their relative sizes)
Geared focus rings (for focus pulling)
Similar size lens bodies (for easy changing without re setting the whole rig)
Same size filter threads (for smaller collection of filters)
I assume the power zooms let you customize how far and how fast it zooms, to do long slow zooms repeatedly with no human error, but i could be wrong.
since discount cine lenses like rokinons have many of these features, i dont know why there is such a difference in price, but the hand built everything aligned to perfection theory makes sense to me.
If you think something is a stupid question, easy solution, dont reply. Then it will drop of the first page and you wont have to see it. If its such a stupid question you should be able to answer it easily, instead of just insulting the person asking.