Yes the Cassini program does discriminate based on several (or possibly several dozen) points.
One is feedback, both number and percentage.
Another is Detailed Seller Ratings.
Another is Item Specifics.
I don't pay much attention to Cassini, since that way madness lies, but other factors may be mentioned by other listers.
I did notice that when my listings got back up to 200 (after a couple of months of no listings at all) that my sales took off. But that is in my category. YMMV.