Not sure what you mean with the question . . . clippings are clippings and they are the same whether you cut off 1/2 " of grass with a 0-turn, a cheapie wal-mart tractor, a pushmower, or a pair of scissors.

Any way you cut it, you'll get the same amount of clippings. (Like the pun?) That said, I use a Scag 0-turn and it disperses the clippings nicely. nonetheless, if the grass gets away from me or my ground speed is too fast, I have the same problems with clumping that anyone has. I can generally get a faster ground speed with my commercial 0-turn because of the faster blade speed.

The other factor involved - again due to the increased blade tip speed - is the increased clippings throw distance/dispersal obtained... giving the appearance of "less" clippings (or reduced windrowing)
A number of commercial units will operate w/o their deck exhaust deflectors in place amplifying the effect above.. but can be somewhat dangerous when tossing a rock or other solid object,IMHO...