All Ride bindings are stiff.
I switched to Union Force for my rail board because of the flex. I wouldn't say that the Delta is a soft binding at all. Hell, even the Contraband isn't a soft binding.
I have my Delta MVMNTs on my Snow Mullet for the pow and BC riding.
My Contrabands are sitting in my closet...
Cats in the alley, Rats in my snakeskin boots
I just can't seem to shake the shackles of the City boy Blues