Kenny was not similar to O'Shea in terms of experience. We can rightly say now that Kenny wasnt good enough at a higher level of management that what he had done previously, but he was a professional football manager. He had won League championships and competed with his team in european competition.
O'Shea has just completed his 4 games of professional football management ever. Even Carsley is not the same by a long stretch. The team that Carsley manages is full of Premiership footballers. He has taken them to an international competition and won. Its not like its a team of u16 kids.
As for thinking Carsley still may take the job, that ship has long sailed.... Although I do hope Im as wrong about that as I was convinced he was taking it! :D