This is a very competitive market and dealers have to keep moving... To this end, there are lots of names made up for different (sometimes quite subtle differences) packages, in hopes to catch the buyers eye -- nothing in the world wrong with this, it is good marketing really and shows that some people are willing to pay attention to the current trends and respond.
I read a really good artical about how car manufacturers pick names for new cars, it is really very involved... of course, you could only guess that you could make the best car on the planet and sales would not be so great if you called it the
Duche Bag 600. I was joking around with one of the manufacturers the other day about making two kickass, top of the line barrel configurations and calling them the "Poser" and the "Wannabe"...
Probably not going to happen...
Anyway, the best bet with trying to decipher who is who at the zoo, is to contact the vendor directly and ask them "what is different about the
Zombie HuntAR-15 (r) from a regular A4 carbine?" -- this will also give you a good feel of the person's knowledge of what they are selling and you will most likely find that most of the good guys on here are more than willing to mix-and-match to get you what you want...