You have received a fourth TSN baby, alright, no puff puff. The fish is VERY stressed in the photo, hence the pale colors. Fish colors depend on mood, age, environment, genetic variations, etc.
Again, TSNs go through heavily evolution of external coloration, hence the TSN catfish being sold don't always look the same to those advertised.
You seem to lean toward a hypothesis that we are wrong, and the vendors are wrong, and you are right. This is fine and fair. Time will show. Stay open-minded and curious, please. And keep coming back to this thread to update your observations on the 4 fish you have now bought and post photos of all 4, now, in their tank, and later.