Can we get back to where this coversation was when I left it yesterday and two pages ago? I liked the "technology will unequivocally and always trump nature" argument.
On an only minimally related note, has anyone thought of how differences in gravity would affect one of these fights? If a tank crushes itself under it's own weight, I think nature wins. Another thing is to consider how ranges would be affected in higher-lower gravity. I could hypothetically almost guarantee you that something adapted for higher gravity will have the edge over us, in terms of mobility.
Battuta: Your bullet bugs, I think, are a little too contrived even for this discussion. Let's try to keep it to single organisms working in groups or hive mind more conventional forces to keep the Naysayers happy, no?

Trashman: "We" aren't using those things. Contrived they may be, stop looking at this from a "human bio-engineering vs. human technology." I came up with a slightly less contrived example than Battuta's in free time during Psych today. I would be happy to type it up, on the condition you don't rant at it for not being able to single-handedly PWNXORZ anything not organic. This discussion isn't meant to prove how organics trump tech, it's an attemp to DISPROVE how Tech always trumps organic.
Alkabeth: I think deathfun put it best:
This is fiction. When we talk fiction, we use fiction to support fiction.
Going back a bit: Comparing "bullet bugs" to bullets is completely valid. If he were comparing bullet bug delivery systems to guns, it would be equally valid. This example is the projectile vs. an organic analogue, not a soldier vs. an organic analogue.