The topic may have been used before, but that could've been ages ago, Besides, there are more users now. You've all probably predicted a winner when you saw the title, but I thought this would be a nice little topic to discuss two favorite sci fi universes(spelling?).
Yes you may compare the units and machinery that are inside of each universe as the title says, it's a vs. I say 40K.

Discussion begins.

I predict bad things.

I'm not very familiar with the Warhammer universe, is there a weapon or defense that can counter a lightsabre? In all reality, you can't pit Star Wars against any other series unless there is an effective counter to the OP'd lightsabre+Jedi combo.

The Space Marines Power sword, http://warhammer40k.wikia.com/wiki/Power_sword
Read on and you'll see why.

I like both of those universes but I have to say that I preffer Star Wars. It seems to be "better" constructed because Warhammer 40k lets face it is background for a tabletop game, there is no real focus on anything (ok there is a lot of focus on space smurfs ) there is like dozen of different factions which don't exactly fit with each other. To name few there are Tau which have "japanese mecha" design to them and are polite and friendly communists who just want to get along (ok not really), there are Necrons which are Arnie inspired highly advanced technologicaly ancient robots who just want to destroy everything and are threat to whole known universe (like aparently every other species, its done this way so players of one faction won't be "losers" in fluff so people can argue on internet forums which race will rule over galaxy), we have daemons and forces of chaos which are eeevil counterpart of "main player" - Imperum of Man. I won't go in detail about different factions inside imperium because its not the point. The empire is on neverending brink of destruction (its not a story but GAME so they can't exactly have one faction win over another, whole universe is in status quo) since their beloved Emprah died and now people worship his corpse sitting on a throne. So even with more recent Star Wars movies (episodes from 1 to 3) which are utter cr*p Star Wars wins because it has some plot running, its not just a background for something else.

Ps. "I've got a bad feeling about this". Vs threads tend to end in flamewars.

@janekk
I meant 40K technology vs. SW technology, not as in a better story/background/plot/whatever.

Oh sorry my bad. Thread subject got me off tracks, I thought that comparing technology was just a example of what you can disscus about to get the topic started.

Star Wars can blow up planets and has swords that can cut through anything short of Beskar. How can it lose?

In Warhammer 40k the Imperium of Man's Exterminatus super-weapon is utilized on a daily basis to eliminate all life on multiple planets, and it is supplied on almost every space-worthy vessel of combat.

And the BlackStar Fortresses can destroy entire solar systems. The power sword is the 40k equivalent of a lightsaber... only better.

This is going to turn into a fanboy war, I can tell it's coming.

True, but it always does, atleast in this case anyway.

Star wars can blaow up planets. WH40K blows up planets with the regularity of urination with nukes that have been described as LIQUEFYING PLANETS. Star wars has magic laser swords that cut through any solid. WH40K has swords that rend your living soul from your body and sends it to be ETERNALLY TORTURED BY A CHAOS GOD, railguns that shoot fast enough to end up firing plasma AS THE DEFAULT WEAPON OF ONE RACE, weapons that do damage by KNOCKING THE PART IT HITS PARTIALLY OFF THE UNIVERSE and hand grenades that cause SMALL SELF-SUSTAINING BLACK HOLES.
So yeah. Star wars is screwed if they actually fight for any reason, but I personally think that series are different, not better than each other.

Star Wars has hot chicks

Well you got us there, but we have scout walkers like the AT-ST, only as tall as a skyscraper. Psykers can split a titan in half with the flick of a wrist, which are about the size of city.

Does Warhammer even have manly women?