The 26-year-old Commonwealth champion, who races against the world's fastest man Usain Bolt in the London Grand Prix at Crystal Palace Friday, believes Jamaicans have more desire to win.
"I've said over the years British sprinters are very lazy and don't really want to practice," Powell told the BBC.
"Maybe it's comfort. In Jamaica you have to work harder for what you want."
Olympic 100, 200 and 4x100 relay gold medalist Bolt will be the favorite when he meets fellow Jamaican Powell Friday.
"Simeon came to Jamaica and from what I observed he is a bit lazy," Powell said.
"He did well though and he made a lot of improvements and if he puts in the effort and the hard work there is a lot more to come."