A sabot slug is significantly different than this full bore 20ga.
The BC of a 45 cal projectile in a sabot to 20ga is a heck of a lot better than a wide and short 20ga.
It will be very interesting what comes out of all of this.
I think think a straight wall (min and max case length) rifle should be allowed, something that limits the user to similar range as the rifled shotguns. That being said I would like to see all magazines plugged to 3 combined, just like the shotguns, that would be more sporting than a 14rd 45LC on a driven hunt with 20 guys in SW Ontario.