The comments by the Trekkies are classic, here’s an excerpt:

Q could easily defeat Darth Vader without breaking a sweat. Q is only held back by the rules of the Continuum. Q has near-omnipotence power as in “god-like”. Darth Vader is just a man/machine with telekinesis and some other psychic powers. People pick him just because he looks cool and menacing.

Uhm, OK Spock!