admin_headers vs taboo_headers

# taboo_headers (level 1)
# If any of the headers of a posted message matches one of these patterns,
# the message will be sent to the list moderators for review.

# The admin_headers setting contains a list of patterns.  If the headers
# of a posted message match at least one pattern, the message will be sent
# to the moderators for approval.

Can someone tell me what the difference is between these?

TIA

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