a green dragon and a red dragon are different plants. they are both cultivers and, if i remember correctly, the green dragon was created by petflytrap/exotic gardens, and the red dragon was created by the atlanta botanical gardens. neither the red dragon or the green dragon are the same as a common venus fly trap.
personally, my green dragon is now my favorite vft. it's very robust, and has great color, even when growing inside my terrarium. i don't have any red dragon's, so i can comment on those.
if you're just starting out, i would suggest going with a plant already potted, as i have better luck with pre-potted vft's.
good luck and happy growing!
tech...