@edgewear The Copy and Paste below from a previous Post within this thread would seem to offer similar content to your own findings when comparing Styli within an assembly, even though only two of the four styli types were the same design, the general assessment was that the overall Build of the Cartridge was the most contributing factor to the differences in presentation being detected.
'As there were Two of the same Brands Styli Model and One other Styli from the same Brand of the former, the effect of the Styli on a replay was suggested to be a consideration to be assessed when listening, i.e surface noise, and whether any comparatively noticeable changes to the information retrieval was being detected.
As said previously, not one attendee was able to say with conviction that they felt the Styli was solely responsible for the noticeable differences in the SQ and Performance on offer from a Cart'.
The discussions concluded with an agreement that leaned toward, the known differences about the methods used for the assembly of the Cart's, was most likely the reason why the Model used in the Standard Form, which was also the Model with most hours of usage of approx 200 Hrs, was the one showing the least attractors and the model with the rebuild to the New High Spec' Parts and approx' 100 Hrs of usage was showing the most attractors.'