traditionally-measured DR being the same (perhaps stop-wedge as opposed to noise measurements), but the noise floor is lower.
This is poppycock (I hope I've got the right word, I'm not a native speaker :-))... dr is what arrives in the image data, and this is the difference between noise floor (including banding which raises it) and clipping.
That's the right word, though I suspect your english lessons are from the 1950s
. These days we'd make mention of a male cow and its excrement.
In any case, what is the dynamic range of cameras which pre-date digital noise? What's the noise floor of emulsion film? I guess no unexposed negative film is truly clear so won't return black, is that the equivalent?
One can use a stop wedge to determine the total range of tones an imaging device, digital or otherwise, is capable of recording. It however isn't particularly useful in determining what kind of detail can be extracted. That's where the noise floor comes in.
In any case, this discussion is all for fun anyway. Nobody knows anything, and we're just making assumptions based on terminology. As mentioned, I expect files similar to those of the mk3, but... bigger. If the shadows have less noise, cool.