Is it a white variety of fruit? It looks like the branches have the characteristic 'corking' or brown edge along the fins of the branches, which is usually found in the more traditional 'heirloom' white species. As for the taste, if by 'perfumic' you mean its tastes a bit like perfume or flowers, that also might be an indication that it one of the original types of dragonfruit, as these fruit had very low sugar content and not much in the way of crossbreeding to modify the flavor.
Middle of the fruit taste is parfumic and flesh is deep red. For me it taste sweet but it is only variety I have tested so far so hard compare. Brix meter is on the way.
Here few more pictures.
Sin Espinas I can then rule out?