This may help: http://www.monsterfishkeepers.com/forums/showthread.php?569167-ID-my-cat&highlight=mystus or leaf through the genus yourself...
Asian striped is generic. If I understood it, you are after the exact species.
P. blochii has no black spot and also as all Pimelodidae has 6 barbels. Bagridae and Mystus have 8 barbels, including the 2 nasal ones.