Why would you use make show rather than make -V in ports?

[Thomas Levine]

The normal port Makefile includes this "show" target.

  $ grep -A3 ^show: /usr/ports/infrastructure/mk/bsd.port.mk
  show:
  .for _s in ${show}
          @echo ${${_s}:Q}
  .endfor

Why would one use it rather than make -V?