Also very interested to hear your detailed take on this..... Comes across a bit biased without clarification.
I think the M+ Deboniar is a fantastic bit of kit. Granted not many people will find their perfect setup right out of the box, but that's the beauty of it, it's so easily tuneable by the user, so it covers a wider gamut of bikes and riders.
The EVOL and Vorsprung cans look great too, and I'm certain they're the same principle, but at least with the Vorsprung you choose the can to match your bike, and that may give you instantly better performance out of the box, but the theory is the same.
I highly doubt either brand is significantly better over the other.