The Italian giants announced last week that Felipe Massa will leave the team after eight years, to be replaced by 2007 world champion Raikonnen from Lotus, alongside Spaniard Fernando Alonso.
However, McLaren star Button said: “It’s going to be an interesting atmosphere between those two, especially if Kimi is as quick as Fernando.
“It’s fun for us watching from the outside, you know, but does it make the team stronger?
I personally don’t think it does."