I have my doubts about the accuracy. It happened while the Conclave was still sealed. For someone to have related this means someone broke the vow of secrecy. Now I can understand the comment on the papal apartment since the Pope is, by all accounts, accustomed to a simpler lifestyle.
I don’t believe Pope Francis would have said that. But who can contradict it now that it’s out on the net?
One of the reasons BXVI resigned, I believe, was that this happened to him more than once: unattributed “quotes” coming from people who had a vested interest in bringing him down. And he was too old and frail to control them.