@Hix No idea. I always follow the idea that the ones with legs out from the body are centipedes, and the ones with legs under the body are millipedes, but I don't think that's particularly accurate.
the gait of the two tends to be quite different, with centipedes generally moving in a more quick, darting fashion, while millipedes amble along more gently. also the fangs of a centipede will almost always be visible by the head, but absent in a millipede. Centipedes also have longer, flatter heads in general, whereas millipedes have shorter, more vertical faces (if 'vertical' is the right word).
@Chlidonias , the fangs will be visible on the side of the head, particularly on larger specimens, without having to pick the centipede up.
I think your photos are a Desmoxytes species, often called 'dragon millipedes'.