What An Se-young lacks compared to Lin Dan

Setting championships aside for a moment.
Lin Dan participated in the World Championships via a wild card because his ranking points had dropped during his long career, yet he still won. He also won the Malaysia Open at the age of 35.
Looking at Lin Dan, he was explosively powerful in his youth, but later on, he survived by using methods similar to Jan Ø jørgensen's [tactical/control-based style].
He had no rival like Lee Chong Wei. Lee Chong Wei's win rate in 2011 was 92.75%, and his career win rate is also slightly higher than Lin Dan's. He beat Lin Dan in every important final.
While his number of titles is naturally fewer than Lin Dan's, An Se-young is currently the only one capable of catching up to Lin Dan.