I do hope he really said that. It's a terrific quote. It's a shame if they didn't get on together. They did play in the same team for England. It might be envy - Greaves's record was phenomenal: 2 goals in every 3 games, and all in the top division. Cloughie managed pretty much a goal a game and had about 250 before Bury's goalkeeper ended his career. Most of these were in the second division, from which he was picked for England, when playing for MIDDLESBROUGH. (or possibly Sunderland)
Whatever, it's still a great quote, from one of the two best players mentioned in this post.
RIP Jimmy Greaves.