I think (using Breezebrowsers histogram) 2035 and 19371 are the best exposures for comparison
CF019372 and _MG_2033 are the best shots. They are as far to the right as possible without clipping, and they are equal in exposure as far as possible.
CF019372 is a tiny bit less bright than _MG_2033, but increased already by 1/3 stop it becomes brighter than _MG_2033. Note, that one needs +1 EV in ACR because of a "pre-mediated" adjustment of -1 EV, which has been carried out by ACR without asking you and without telling you about it.
Although the highlights can't be analyzed (clouds are not very suitable to comparison between two shots), that does not pose any problem, as the stress is not on the details and noise in the highest range.
Unfortunately, the salt shaker is not in the shots, but the funny animals on the yellow pot with the snow flakes can be used as "fine detail".
I added 5 EV to both images and selected some originally dark areas. Based on the visual appearance, IMO
the 5D's DR over 8 stops is a myth, while the P30 goes somewhat over 10 stops.
It is important to note, that the 5D has only 8 levels to spare for the 9th stop (and seven for anything beyound that). This explains the "good noise behaviour" of the 5D:
the noise is low, because there are no levels to distinguish between.
A layered TIFF with some related screen shots can be downloaded from
here, only 1.8 MBFinally, a small test for the value of the bit depth over 12. One of the layers show the P30 image with the four low ordeer bits shifted out, +5 EV. The same area selected as in the normal processing, the noise (in terms of standard deviation) is higher without the low order bits.