thats the same cat i have (yours is lighter and overall better looking though

). I got mine from a dirty jam packed LFS tank though, so it will take more time i think. If these are wild caught, then these are not hybrids like was said above. It is entirely possible that these are previously undescribed Pimelodidae cats. I do not know if they are collecting in a new area or what though. I would suggest a different varient of TSN but the snout does not really match up with them either though the body shape does resemble one. I do not think the tail resembles the TSN either.
does yours have smaller black spotting towards the top?