It is hypothesized that the origins of both the "orange tail" hypos and the "salmon" hypos are the same.
The difference is that salmons have been selectively bred by Rich Ihle. Over time he has done a lot with them and developed a great diverse line. There can be $250 salmons as well as $3500 salmons. Rich Ihle has been very successful in taking salmons to the next level year by year... because of that his line tends to be more well known and desirable.
I believe the orange tail hypos originated from Jeff Gee. Gee line hypos are amazing in their own way as well. I hope to snag a few nice Gee hypos to diversy my lines at some point.
The "yellow tails" I have never heard or seen. Not sure if its an actual genetic line. Could just be that the litter had more yellow in the tails so they use that label. I doubt its a new bloodline however (just a guess).
I personally believe Gee hypos and Salmons probably came from the same bloodline. There are however 1 or 2 other known lines that could likely be of different blood. What has been done through selective breeding over time is what has made the difference between salmons and non-salmons.