I think TA does a much better job on Kobe than Ray does. When Ray guards Kobe, Kobe immediately starts playing way more aggressive. I'm sure the fact neither like each other plays a role in that. That's not true with TA on him, TA does a better job bodying him up and making him into a jumper shooter.
As for Ray's shooting? I think he's just in a slump and you gotta give some credit to Fisher. Fisher has done a much better job on him after game 2. He is he staying with him more and getting physical which starts to frustrate Ray.