Bob Babbitt specifically stated that the "mock contracts" were often wrong, and often didnt reflect whose take was actually used. He recalled arguing with Jamerson in a bar when a song they'd both recorded a part for came on, about which of them was actually playing the final version. The residuals were based on the contracts and so they are only a guide at best. I'd prefer to go with the actual living memory of people who were physically there (where more than one is saying the same thing as Ck seems a bit inconsistent at best), and it seems a little unfair to lay claim to a whole canon of work when your protagonists are both dead
Since CK is a pick player,and Jamerson and Babbitt both used fingers, it should be fairly easy to tell their styles apart ?