Lord of the Flies similarities will grow and progress as the series continues.
The empty rocking chair (aka supreme force of the Lost island) was a reference to the rocking dead parachutist (aka monster and supreme force of the LotF island).
There are many similarities in the characters, as if some of the characters from Lost are based on some from the book;
Piggy from LotF-Hurley from Lost: Both characters are overweight and show signs of being the, "Why is this going on?" type of character (They both have common sence).
Jack from LotF-Locke from Lost: Both are hunters that will do whatever it takes including murder for what they believe to be what's good for the island, both lead a group when the people split up into two groups on the island.
Ralph from LotF-Jack from Lost: Both are the "Good Guy" defacto leaders that care for the group. Both started their leadership by building shelters on a beach camp, both focus on using fire to help get them rescued (Jack's was the time when he wanted to wait for night to burn the fuselage), both lead a group when the people split up into two groups on the island.