Well, my bung came from a fella who'd just bought a Nur-Spec for his Scooby.
But yeah, from what I could see in checking, they were all the same.
I'd say this one probably even turns the tailpipe section of the silencer in to a secondary silencer if you see what I mean?
As it has holes in the center tube, whereas the Nur-Spec just has a pipe as you mention, all it's doing is stopping the sound waves bouncing around in the end section.
But I'm a brand whore* though so it had to be Blitz or better for me.
* Well, I am now. When a bit younger I used to buy cheaper stuff, but I want the best for my car now.