Kyle and Kamilla have played Joe twice now. If either of them are sitting with Joe at the end you can pull out the "Joe had a solid alliance with two guys and I got rid of them both, including getting Joe to get rid of the 2nd one himself." They essentially "infiltrated" Joe's Strong Person Alliance, let him think he was running things and struck when they could.
Personally, I think Kyle should get the win because he was the one on the front lines of the infiltration. Kamilla has just kind of been there and thanks to Kyle's successful infiltration was able to get Joe + the Strong People Alliance to stay away from Kamilla. He even got them to get out David, who was in the Alliance, when he sniffed out that Kyle was working with Kamilla. David didn't play that situation right at all, but that doesn't mean he wasn't wrong.