Looks like you'll have to wait until a MMK owner buys the new 11" Anfibio coil to report back. No one seems to want to take the plunge.
All I can say is I prefer the new 11" coil over the 9x11 size of the Impact/Kruzer. The rounder shape seemed to have better performance overall using the Anfibio.
So it can make the Anfibio appear to be a better detector. But, many of us who had had both the MMK and Anfibio I believe feel using the same 11' coil in the same modes would be of similar performance. I suggested long ago, if you own a MMK and you happy with it, just grab the new 11" coil.
Quotes:
" Ellipticals are depth limited by their width, and separation limited by their length.
A 5x10" Elliptical will only go about as deep as a 6" round, yet will not separate any better than a 10" round. If the field is tighter side-to-side, then there is also a loss of depth. A 10" elliptical DD has just as long a detection field as a 10" round DD"
"I get better separation with my elliptical 6x10 than I do with my 10DD. It may not go as deep"
"I always have found the round widescan coils will give better depth than an elliptical of the same size.
Compare a joey coil(elliptical) and minelabs own coils(round) of this size(they make two) and both of the minelabs will hit deeper targets then the joey will."
"Round put out a deeper field, but ellipticals usually have a sharper response, particularly on smaller targets.
Depending on the size of the target, and the size of the coil, I'm sure you could see examples of a round coil being superior, and an elliptical being superior. "