Internet Explorer versus Mozilla Firefox! It's a classical argument, or... shall I say, it's a common one. While it isn't necessarily "good versus evil," it may very well be according to perspective. There are avid IE users, and avid FF users, so, naturally, they'll argue about which is better. And, when there's an issue about who/what is "better," it tends to be a watered down version of the "good versus evil" concept.
I show IE as a vicious little beast, maybe because I'm biased, but more because it depicts the general side of negative feedback, whereas Firefox shows its back and it's hard to tell if it has the same kind of face/impression. So this isn't to say, exactly, which is better, but rather an example of such.
Also, the reason why IE is wearing makeshift ears and a tail is because it recently shifted to look and operate more like Firefox. And, though it does succeed in some aspects, it is certainly not quite the same.
On another note, "Pro Utilitate Hominum" translates roughly to "For the service of mankind," and that includes males and females, to clarify. I used this saying because that's what the internet is for, for our use. It is a virtual service for humans who have access to connected computers. And these two browsers, IE and FF, are fighting to win over their audiences, always improving and updating to make life easier for us.