I think it shows that if you work within the parameters of the example in your real photography, the 5DSR is sharper and has less noise, yes. However, what it does not show is the other features that may be helpful to a 5D IV shooter (depending on application of course), such as frame rate etc. Moreover, in terms of image quality terms, the example shown does not highlight the improved Dynamic Range on the new sensor. The extra dynamic range is irrelevant to some users, but highly relevant to others. For the second group, their appreciation of a good deal more DR and less pattern noise when files are pushed hard is not indicative of poor technique.
Clearly these two cameras have their strengths and weaknesses, but it is erroneous to suggest that this comparison proves that the 5DSR has 'better image quality'. In some respects, yes, but in others, it is a clear 'no'.
RickSpringfield said:
Sounds like the OP is objectively confirming that provided your photography isn't suffering soley from a lack of creature comfort features or poor technique in practice; the 5DSR is the clear winner. Even though the 5D Mark IV is better in every other spec, the 5DSR still has the capability to produce a better end result image.
I've got to believe that matters to many.