Because the 470 case is much larger one could load the 470NE to much, much higher velocities than the 458 WM, if one wanted to do so. I was shooting some loads at ~2250 fps with no accuracy or apparent pressure problems.

The Krieghoff's barrel profile is nearly uniform (and slim) from chamber to muzzle, which I am guessing make it relatively insensitive to regulation issues. All my rounds from sub-2000 fps to over 2250 fps were chucking them into the same spot at 25 yards, at least as far as I could tell shooting off-hand.

As far as I can tell, the old and virtually every present DR have these huge barrel profiles at the chamber because they are using over-sized actions, which make them over-weight beasts. But other opinions may exist!