Looked around a bit but have not been able to find an example of that particular cut. Who makes it?
Not knowing for sure, it sounds like it might be a variation of the ghost cut?... I am imagining a half-moon-shaped cut in the primary reed?...
If so, I doubt it would be superior to other cut designs but, of course, the "proof in the pudding" would be the call construction and the ability of the user to make it perform...