If memory serves, and quite often, it unfortunately doesn't, the Red Dragon was developed by Atlanta Botanical Gardens. THe moethod for getting the red dragon is to keep crossing redder and redder plants back against each other in order to get redder and redder plants.
If you want another interesting example of this in the animal kingdom (or whatever it's called now ~ nods to darcie~) check out discuss breeding and angel fish breeding on the web, very cool stuff.
Anyhow, because this process usually involves selfing, and seed production from genetically similar plants, the weaknesses of the plant become exagerated over time, making it 'weaker', I think most hobbyists would pretty much gurantee that if you put 5 red dragons and 5 green dragons in the same crowded pots, that eventually, over years, the greens would choke out the reds by outcompeteing them, they are infact, stronger plants. (I think Dente, especially the PFT version of Dente is even stronger, but that's just MHO.)
Any how, the green dragon is a result of crossing a plant on the road to the red dragon back against a typical flytrap in effort to restore vigour to the line, which, I think we can see it did!
Now, that is tnot to say there aer not spectacular red dragons out there, or that red dragons are feeble and bad, they are not, I have some, and I love them.
The only differences I have seen between the clones is coloration, the green dragon, is not supposed to be able to reach 100% red coloration, while the aki-ryu (red dragon) can reach a deep lusterous redish purple. The Green Will always have some red in it. If you buoght your plant from petflytrap, then everyone of you essentially hast he same plant genetics... pretty cool thought huh?