Hi,
I didn´t intend to use the belly marks to distinguish your fish from P. sp. "L 205"..

That´s just the most certain way to tell them apart from L 387, which can look very similar to your L 147, if the L 147 are not fully grown.
Why isn´t it L 205? The easy way would be to say it doesn´t "fit the pattern"..
L 205 should have smaller spots on the head, with much more space between the individual spots. Also, the body should not be that markedly spotted, if it was L 205. In L 147 instead, the spots become gradually bigger from head to caudal and hence cover the whole body, as compared to spots equally sized and roughly only up to the caudal fin.
Does that help?
Sandor
"What gets us into trouble is not what we don´t know.
It´s what we know for sure that just ain´t so."
--Mark Twain