I have a mini-Mag lens with the LDF on it. It was a much more diffusive lens than the Acrylite mini-Mag lens I have. I thought it took too much brightness away, myself, and it didn't leave much of a hotspot with a NX-05. But then, the NX-05 already is a pretty nice beam.
I haven't tried it on a reflectored light.
The Acrylite by itself, is very nice material. I forget all the grades of it, but some diffuse more than others, although, I found it impossible to tell the differences by eye only.
I have tested the Acrylite on an Inretech Super6, and a lambda Megaclops SE. The Super6 casts a swath of light, and didn't really benefit from the diffusion, but the Megaclops did.
At the time I tested it, I didn't have the Krylon sputtered reflector. The Acrylite smoothed out the minor artifacts present with the side emitter and Mag reflector, and completely removed the shadows from the die leads that were visible in the beam.
I have a headlamp with an orange peel type reflector, the older style Pelican HeadsUP Lite. The beam is pretty smooth, no rings or voids, but it isn't perfect. It's kind of raggedy around the edges, or splotchy.
lambda's Krylon sputtered Mag reflectors smooth a beam very very nice, as well. If they're not going to be used in very hot incandescent mod, it's a great alternative.
I don't have a light in which to try all three.