It would make sense to me if both parties experienced the same thing while connected, and when seperated afterwards, contain partial memories of the experience (since memories seem to be distributed throughout the brain, they would be distributed throughout the super brain, leaving only partial fragments to any one part). I bet the individual brains would have different stories to explain the previous connected experience, due to the different memory fragments they have access to.

That's a strange extrapolation. I'd rather assume that neither will survive the transition, and a new personality will result. At best. Which is not so bad, if the new one is better than both that came before.

You can only have so drastic of a change in how you think from ten minutes of experience.