Green was faster than Brown by a little bit

they didn't race head to head in Superstars but they
both ran in the NFL's fastest man competition

Green beat Brown head-to-head in 1986 to win title
Brown won it in 1987 but Green did not compete
Green won it in 1988 but Brown did not compete
Green won it in 1989 and Brown did not make finals
Brown won it in 1990 but Green was not there
Green won it in 1991 beating Brown in a photo finish

every time Green entered he won, beating Brown head-to-head twice