[Exim] system filter inquiry

Is there any inefficiency (or GAIN in efficiency) between the following
two filters?

# Exim filter

if $header_subject: contains "coolprogs"
        then deliver spam@???
             finish
endif

if $header_subject: contains "call 24 hours a day"
        then deliver spam@???
             finish
endif

if $header_subject: begins "fire your boss!!"
        then deliver spam@???
             finish
endif

#
# EOF

compared to:
if $header_subject: contains "coolprogs" or
   $header_subject: contains "call 24 hours a day" or
   $header_subject: begins "fire your boss!!"
        then deliver spam@???
             finish
endif

#
# EOF

--
Jim Pazarena     mailto:paz@ccstores.com 
                 http://www.qcislands.net/paz