Data and Displays · Hard problem

A back-to-back stem-and-leaf plot compares the scores of two teams (stem $=$ tens digit; Team A's leaves are on the left and read outward from the stem, Team B's leaves are on the right):

$8\ 5 \mid 4 \mid$

$7\ 6\ 2 \mid 5 \mid 8$

$3\ 3\ 1 \mid 6 \mid 4\ 6\ 9$

$4\ 0 \mid 7 \mid 1\ 2\ 5\ 8$

$2 \mid 8 \mid 0\ 5$

By how much does Team B's median exceed Team A's median?